Linguistik-Klassifikation: Computerlinguistik / Computational linguistics
4 search hits
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Factoring Predicate Argument and Scope Semantics : underspecified Semantics with LTAG
(2003)
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Laura Kallmeyer
Aravind K. Joshi
- In this paper we propose a compositional semantics for lexicalized tree-adjoining grammar (LTAG). Tree-local multicomponent derivations allow separation of the semantic contribution of a lexical item into one component contributing to the predicate argument structure and a second component contributing to scope semantics. Based on this idea a syntax-semantics interface is presented where the compositional semantics depends only on the derivation structure. It is shown that the derivation structure (and indirectly the locality of derivations) allows an appropriate amount of underspecification. This is illustrated by investigating underspecified representations for quantifier scope ambiguities and related phenomena such as adjunct scope and island constraints.
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Flexible composition in LTAG : quantifier scope and inverse linking
(2003)
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Laura Kallmeyer
Aravind K. Joshi
Maribel Romero
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Semantic construction in feature-based TAG
(2003)
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Claire Gardent
Laura Kallmeyer
- We propose a semantic construction method for Feature-Based Tree Adjoining Grammar which is based on the derived tree, compare it with related proposals and briefly discuss some implementation possibilities.
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Parsing without grammar - using complete trees instead
(2003)
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Sandra Kübler
- The definition of similarity between sentences is formulated on the levels of words, POS tags, and chunks (Abney 91; Abney 96). The evaluation of this approach shows that while precision and recall based on the PARSEVAL measures (Black et al. 91) do not reach state of the art Parsers yet (F1=87.19 on syntactic constituents, F1=77.78 including functionargument structure), the parser shows a very reliable performance where function-argument structure is concerned (F1=96.52). The lower F-scores are very often due to unattached constituents.
