SynCro - Parsing Simple Croatian Sentences
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SynCro - Parsing Simple Croatian Sentences
Kristina Vučković, Božo Bekavac, Zdravko DovedanUniversity of Zagreb, Faculty of Humanities and Social Science
{kvuckovi, bbekavac,zdovedan}@ffzg.hr
NooJ2009Tozeur
2009-06-09
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Overview of the work
on our way to complete parse trees for Croatian sentences building partial trees for simple Croatian
sentences favor of precision over recall
Building syntactic parse trees for Croatian is quite a challenge!
properties of Croatian language: mostly free word (better to say
constituent?) order → scrambling very frequent
could be a long distance between parts of predicate
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Syntactic trees
at this stage, the following structures of parse trees are described verb subject - verb subject - verb - direct object subject - verb - direct (and, or indirect
object) in addition to all these combinations, we
can detect adverbial phrases of place and adverbial phrases of time (temporal
expressions) Complex combinations (e.g. multiple PPs)
are not described
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Sentance structure in Croatian
<subject> <predicate> <object_D> <object_ID> <A_place><A_time><predicate>
<predicate>
<subject>
<subject>
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Recognition of: predicate node
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Recognition of: subject node
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Recognition of: direct object node
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Recognition of: indirect object node
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Recognition of: Adverbs of Time
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Recognition of: Adverbs of Place
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Exampless
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Exampless
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Exampless
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Exampless
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Exampless
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Exampless
dislocated predicate <PRED>
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Exampless
dislocated predicate <PRED>
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Exampless
dislocated predicate <PRED>
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Exampless
dislocated predicate <PRED> and dislocated subject <SUB>
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Addition to the Lexicon
For recognizing Adverbials of Time and Place:
Adjectives +time / + place R+vr R+mt
Prepositions +time / + place S+vr S+mt
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Problems
if there is a nominal predicate
if the <NP> node is a coordination made of 2 or more <NP>’s of different gender
if <S> has more than one annotation
ex. The child was very
smart.
-> The child was->was very smart. ex. The boy and a girl were
very smart.
->The boy and a girl =><NP+p+m> ex.
He was singing from March to April.
He was singing from Paris to Tozeur.
and Future Work
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