Francisco Costa

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This paper reports on the participation of the Portuguese grammar LXGram in the Shared Task “Comparing Semantic Representations” of STEP 2008. In view of the goals of this Shared Task, the main characteristics of this grammar are briefly introduced and the semantic formalism that it employs is described. The data for the Shared Task were obtained by(More)
Deep grammars handle with precision complex grammatical phenomena and are able to provide a semantic representation of their input sentences in some logic form amenable to computational processing, making such grammars desirable for advanced Natural Language Processing tasks. The robustness of these grammars still has room to be improved. If any of the(More)
The work reported in this paper is part of a project that aims at describing the role of prosody in conveying discourse structure in European Portuguese. We conducted an empirical study to investigate whether the organization of discourse could be reflected by the occurrence of pauses. In order to achieve that, we started by asking sixteen subjects to(More)
Corpora of sentences annotated with grammatical information have been deployed by extending the basic lexical and morphological data with increasingly complex information, such as phrase constituency, syntactic functions, semantic roles, etc. As these corpora grow in size and the linguistic information to be encoded reaches higher levels of sophistication,(More)
This paper describes the creation of an innovative and highly parallel treebank of three languages from different language groups — English, Portuguese and Bulgarian. The linguistic analyses for the three languages are done by compatible parallel automatic HPSG grammars using the same formalism, tools and implementation strategy. The final analysis for each(More)