Information-based syntax and semantics: Vol. 1: fundamentals
Information-based syntax and semantics: Vol. 1: fundamentals
A compact architecture for dialogue management based on scripts and meta-outputs
ANLC '00 Proceedings of the sixth conference on Applied natural language processing
TDL: a type description language for constraint-based grammars
COLING '94 Proceedings of the 15th conference on Computational linguistics - Volume 2
High precision analysis of NPs with a deep processing grammar
STEP '08 Proceedings of the 2008 Conference on Semantics in Text Processing
Introduction to the shared task on comparing semantic representations
STEP '08 Proceedings of the 2008 Conference on Semantics in Text Processing
Introduction to the shared task on comparing semantic representations
STEP '08 Proceedings of the 2008 Conference on Semantics in Text Processing
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LXGram is a hand-built Portuguese computational grammar based on HPSG (syntax) and MRS (semantics). The LXGram system participated in the STEP 2008 shared task which aims at comparing semantic representations produced by NLP systems such as LXGram. Every participating team had to contribute a small text. The text that we submitted for the shared task was originally in Portuguese (an excerpt from a newspaper) and translated into English, to make a meaningful comparison at the shared task possible. Likewise, the English texts contributed by the other participating teams were translated into Portuguese. Because the LXGram generates many different analyses (mainly due to PP attachment ambiguities), the preferred analysis was selected manually. It was required to extend LXGram's lexicon and inventory of syntax rules to be able to get a reasonable performance on the shared task data. Eventually, our system was able to produce an analysis for 20 out of the 30 sentences of the shared task data.