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Transcript of Dr awing Trees & Ambiguity in Trees - Template.net · ©Andr ew Carnie, 2006 Dr awing trees Step 1:...
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©Andrew Carnie, 2006
Drawing Trees & Ambiguity in Trees
©Andrew Carnie, 2006
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©Andrew Carnie, 2006
Some Phrase Structure Rules of English
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©Andrew Carnie, 2006
Some Phrase Structure Rules of English
CP ➝ (C) TP
TP ➝ {NP/CP} (T) VP
VP ➝(AdvP+) V (NP)({NP/CP}) (AdvP+) (PP+) (AdvP+)
NP ➝ (D) (AdjP+) N (PP+) (CP)
PP ➝ P (NP)
AdjP ➝ (AdvP) Adj
AdvP ➝ (AdvP) Adv
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©Andrew Carnie, 2006
Drawing trees
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©Andrew Carnie, 2006
Drawing treesStep 1: Identify the parts of speech for all the words in the sentence
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©Andrew Carnie, 2006
Drawing treesStep 1: Identify the parts of speech for all the words in the sentenceStep 2: try to figure out what words "go together in phrases" (i.e. figure out what the constituents are)
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©Andrew Carnie, 2006
Drawing treesStep 1: Identify the parts of speech for all the words in the sentenceStep 2: try to figure out what words "go together in phrases" (i.e. figure out what the constituents are)Step 3: apply the rules backwards (bottom up) to build the tree.
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©Andrew Carnie, 2006
Drawing treesStep 1: Identify the parts of speech for all the words in the sentenceStep 2: try to figure out what words "go together in phrases" (i.e. figure out what the constituents are)Step 3: apply the rules backwards (bottom up) to build the tree. Start with AdvP & AdjPs
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©Andrew Carnie, 2006
Drawing treesStep 1: Identify the parts of speech for all the words in the sentenceStep 2: try to figure out what words "go together in phrases" (i.e. figure out what the constituents are)Step 3: apply the rules backwards (bottom up) to build the tree. Start with AdvP & AdjPs Next do NPs, then PPs, then VPs
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©Andrew Carnie, 2006
Drawing treesStep 1: Identify the parts of speech for all the words in the sentenceStep 2: try to figure out what words "go together in phrases" (i.e. figure out what the constituents are)Step 3: apply the rules backwards (bottom up) to build the tree. Start with AdvP & AdjPs Next do NPs, then PPs, then VPs Generally, start at the RIGHT edge of the tree and work leftwards apply the TP rule last.
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©Andrew Carnie, 2006
Drawing treesStep 1: Identify the parts of speech for all the words in the sentenceStep 2: try to figure out what words "go together in phrases" (i.e. figure out what the constituents are)Step 3: apply the rules backwards (bottom up) to build the tree. Start with AdvP & AdjPs Next do NPs, then PPs, then VPs Generally, start at the RIGHT edge of the tree and work leftwards apply the TP rule last.Step 4: now check your tree against your rules. Start at the top, and check that each set of lines can be generated by the rules.
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©Andrew Carnie, 2006
Drawing trees
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©Andrew Carnie, 2006
Drawing trees
Important:
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©Andrew Carnie, 2006
Drawing trees
Important: Nothing can be left dangling in space.
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©Andrew Carnie, 2006
Drawing trees
Important: Nothing can be left dangling in space. Everything has to be attached to something higher up.
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©Andrew Carnie, 2006
Drawing trees
Important: Nothing can be left dangling in space. Everything has to be attached to something higher up.Lines can't cross one another.
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©Andrew Carnie, 2006
Some trees
The very big man gave the marble to his son
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©Andrew Carnie, 2006
Some trees
The very big man gave the marble to his son D Adv Adj N V D N P D N
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©Andrew Carnie, 2006
Some trees
The very big man gave the marble to his son D Adv Adj N V D N P D N
AdvP
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©Andrew Carnie, 2006
Some trees
The very big man gave the marble to his son D Adv Adj N V D N P D N
AdvPAdjP
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©Andrew Carnie, 2006
Some trees
The very big man gave the marble to his son D Adv Adj N V D N P D N
NPAdvP
AdjP
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©Andrew Carnie, 2006
Some trees
The very big man gave the marble to his son D Adv Adj N V D N P D N
NPNPAdvP
AdjP
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©Andrew Carnie, 2006
Some trees
The very big man gave the marble to his son D Adv Adj N V D N P D N
NPNP
NP
AdvPAdjP
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©Andrew Carnie, 2006
Some trees
The very big man gave the marble to his son D Adv Adj N V D N P D N
PP
NPNP
NP
AdvPAdjP
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©Andrew Carnie, 2006
Some trees
The very big man gave the marble to his son D Adv Adj N V D N P D N
PP
NPNP
NP VP
AdvPAdjP
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©Andrew Carnie, 2006
Some trees
The very big man gave the marble to his son D Adv Adj N V D N P D N
PP
NPNP
NP VP
TP
AdvPAdjP
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©Andrew Carnie, 2006
Some trees
The big lazy dog bit a mouthful of food
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©Andrew Carnie, 2006
Some trees
The big lazy dog bit a mouthful of foodD Adj Adj N V D N P N
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©Andrew Carnie, 2006
Some trees
The big lazy dog bit a mouthful of foodD Adj Adj N V D N P N
AdjP
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©Andrew Carnie, 2006
Some trees
The big lazy dog bit a mouthful of foodD Adj Adj N V D N P N
AdjP AdjP
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©Andrew Carnie, 2006
Some trees
The big lazy dog bit a mouthful of foodD Adj Adj N V D N P N
AdjP AdjP NP
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©Andrew Carnie, 2006
Some trees
The big lazy dog bit a mouthful of foodD Adj Adj N V D N P N
PP
AdjP AdjP NP
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©Andrew Carnie, 2006
Some trees
The big lazy dog bit a mouthful of foodD Adj Adj N V D N P N
PP
NP
AdjP AdjP NP
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©Andrew Carnie, 2006
Some trees
The big lazy dog bit a mouthful of foodD Adj Adj N V D N P N
PP
NP
AdjP AdjP
NP
NP
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©Andrew Carnie, 2006
Some trees
The big lazy dog bit a mouthful of foodD Adj Adj N V D N P N
PP
NP
VP
AdjP AdjP
NP
NP
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©Andrew Carnie, 2006
Some trees
The big lazy dog bit a mouthful of foodD Adj Adj N V D N P N
PP
NP
VP
AdjP AdjP
NP
TP
NP
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©Andrew Carnie, 2006
Some trees
I will finish an assignment about trees
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©Andrew Carnie, 2006
Some trees
I will finish an assignment about treesN T V D N P N
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©Andrew Carnie, 2006
Some trees
I will finish an assignment about treesN T V D N P N
NP
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©Andrew Carnie, 2006
Some trees
I will finish an assignment about treesN T V D N P N
NP
NP
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©Andrew Carnie, 2006
Some trees
I will finish an assignment about treesN T V D N P N
PP
NP
NP
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©Andrew Carnie, 2006
Some trees
I will finish an assignment about treesN T V D N P N
PP
NP
NP
NP
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©Andrew Carnie, 2006
Some trees
I will finish an assignment about treesN T V D N P N
PP
NP
NP
VP
NP
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©Andrew Carnie, 2006
Some trees
I will finish an assignment about treesN T V D N P N
PP
NP
NP
TPVP
NP
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©Andrew Carnie, 2006
A Personal Pet-peeveThe line in a tree represents the application of a PSR, so there is no line between a word
and its category:
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©Andrew Carnie, 2006
A Personal Pet-peeveThe line in a tree represents the application of a PSR, so there is no line between a word
and its category:
NP
N
Peanuts
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©Andrew Carnie, 2006
A Personal Pet-peeveThe line in a tree represents the application of a PSR, so there is no line between a word
and its category:
NP
N
Peanuts
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©Andrew Carnie, 2006
A Personal Pet-peeveThe line in a tree represents the application of a PSR, so there is no line between a word
and its category:
NP
N
Peanuts
NP
NPeanuts
✓
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©Andrew Carnie, 2006
AmbiguityAmbiguity: when a sentence has two meaningsParaphrase: A restatement of the meaning of a sentence, used to disambiguate ambiguous sentences.
John went to the bank. Paraphrase 1: John went to the financial institutionParaphrase 2: John went to the side of the river
We use paraphrases to disambiguate. But be sure that when you draw trees you draw them of the ORIGINAL sentence, not the paraphrase
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©Andrew Carnie, 2006
Ambiguity
Two kinds:
Lexical ambiguity uses words with more than one meaning.
Structural ambiguity ambiguous due to the structure of the tree.
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©Andrew Carnie, 2006
Lexically Ambiguous Headlines Safety Experts Say School Bus Passengers Should Be Belted
Drunk Gets Nine Months in Violin Case Iraqi Head Seeks Arms
Farmer Bill Dies in House Stud Tires Out
Prostitutes Appeal to Pope British Left Waffles on Falkland Islands
Reagan Wins on Budget, But More Lies Ahead Red Tape Holds Up New Bridge
Deer Kill 17,000 Man Struck by Lightning Faces Battery Charge
Ban on Soliciting Dead in Trotwood
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©Andrew Carnie, 2006
Structurally Ambiguous Headlines
Two Sisters Reunited after 18 Years in Checkout Counter
Enraged Cow Injures Farmer With AxHospitals are Sued by 7 Foot Doctors
Killer Sentenced to Die for Second Time in 10 Years.
???
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©Andrew Carnie, 2006
The Principle of Modification“The Golden Rule”
If an XP modifies a head Y then XP must be Y’s sister (be the daughter of YP)
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©Andrew Carnie, 2006
The Principle of Modification“The Golden Rule”
If an XP modifies a head Y then XP must be Y’s sister (be the daughter of YP)
YP XP Y
sisters
YP Y XP
sisters
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©Andrew Carnie, 2006
Ambiguity in Structure
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©Andrew Carnie, 2006
Ambiguity in StructureThe man put the book in the box on the table
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©Andrew Carnie, 2006
Ambiguity in StructureThe man put the book in the box on the tableMeaning 1: put the book (currently in the box) on
the table. The box isn’t on the table
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©Andrew Carnie, 2006
Ambiguity in StructureThe man put the book in the box on the tableMeaning 1: put the book (currently in the box) on
the table. The box isn’t on the table
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©Andrew Carnie, 2006
Ambiguity in StructureThe man put the book in the box on the tableMeaning 1: put the book (currently in the box) on
the table. The box isn’t on the table
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©Andrew Carnie, 2006
Ambiguity in StructureThe man put the book in the box on the tableMeaning 1: put the book (currently in the box) on
the table. The box isn’t on the table
Meaning 2: put the book into the box. The box is on the table.
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©Andrew Carnie, 2006
Ambiguity in StructureThe man put the book in the box on the tableMeaning 1: put the book (currently in the box) on
the table. The box isn’t on the table
Meaning 2: put the book into the box. The box is on the table.
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©Andrew Carnie, 2006
Ambiguity in StructureThe man put the book in the box on the tableMeaning 1: put the book (currently in the box) on
the table. The box isn’t on the table
Meaning 2: put the book into the box. The box is on the table.
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©Andrew Carnie, 2006
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©Andrew Carnie, 2006
VP
V NP PPput D N PP P NP the book on P NP D N in the table D N the box
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©Andrew Carnie, 2006
VP
V NP PPput D N PP P NP the book on P NP D N in the table D N the box
VP
V NP PPput D N P NP the book in D N PP the box P NP on D N the table
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©Andrew Carnie, 2006
Ambiguity in Structure
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©Andrew Carnie, 2006
Ambiguity in Structure
I killed the king with the knife
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©Andrew Carnie, 2006
Ambiguity in Structure
I killed the king with the knifeeasy reading: “used a knife for the killing”
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©Andrew Carnie, 2006
Ambiguity in Structure
I killed the king with the knifeeasy reading: “used a knife for the killing”harder reading: “king holding a knife”
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©Andrew Carnie, 2006
Ambiguity in Structure
I killed the king with the knifeeasy reading: “used a knife for the killing”harder reading: “king holding a knife”
I killed the king with the red hair
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©Andrew Carnie, 2006
Ambiguity in Structure
I killed the king with the knifeeasy reading: “used a knife for the killing”harder reading: “king holding a knife”
I killed the king with the red haireasy reading: “king who has red hair”
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©Andrew Carnie, 2006
Ambiguity in Structure
I killed the king with the knifeeasy reading: “used a knife for the killing”harder reading: “king holding a knife”
I killed the king with the red haireasy reading: “king who has red hair”harder reading: “used red hair to kill him”
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©Andrew Carnie, 2006
I killed the king with a knife
TP
D N P NP
killed using a knife
NP VP
N V NP PPI killed
the king withD N
a knife
king holding a knifeTP
NP VP
I killedD N PPthe king
D Na knife
N V NP
P NPwith
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©Andrew Carnie, 2006
I killed the king with red hairkilled using red hair
TP
D N P NP
NP VP
N V NP PPI killed
the king withAdjP N hairAdjred Adjred
red-headed kingTP
NP VP
I killedD N PPthe king
AdjP Nhair
N V NP
P NPwith
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©Andrew Carnie, 2006
Summary
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©Andrew Carnie, 2006
SummaryTree drawing
practice, practice, practice
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©Andrew Carnie, 2006
SummaryTree drawing
practice, practice, practice
Apply rules from bottom up, start with AdjPs, AdvPs, NPs, PPs first. Start from right edge.
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©Andrew Carnie, 2006
SummaryTree drawing
practice, practice, practice
Apply rules from bottom up, start with AdjPs, AdvPs, NPs, PPs first. Start from right edge.
Make sure everything is connected, no crossing lines.
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©Andrew Carnie, 2006
SummaryTree drawing
practice, practice, practice
Apply rules from bottom up, start with AdjPs, AdvPs, NPs, PPs first. Start from right edge.
Make sure everything is connected, no crossing lines.
CHECK your trees against the phrase structure rules.
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©Andrew Carnie, 2006
Summary
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©Andrew Carnie, 2006
SummaryStructurally vs. Lexically ambiguous.
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©Andrew Carnie, 2006
SummaryStructurally vs. Lexically ambiguous.
Structurally ambiguous
different meanings have different trees.
relies on the principle of modification!
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©Andrew Carnie, 2006
SummaryStructurally vs. Lexically ambiguous.
Structurally ambiguous
different meanings have different trees.
relies on the principle of modification!
A paraphrase is a restatement of meaning. Don’t draw trees for the paraphrase -- draw them for the actual sentence.