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Journals and Conferences
Data Set Used
In this paper we investigate the relevance of aspectual type for the problem of temporal information processing, i.e. the problems of the recent TempEval challenges. For a large list of verbs, we obtain several indicators about their lexical aspect by querying the web for expressions where these verbs occur in contexts associated with specific aspectual… (More)
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)
This paper reports on experimenting with the extraction of temporal information from Portuguese texts and presents LXTimeAnalyzer, a tool that annotates a text with the temporal information conveyed by it. This tool is the first of its kind being reported for Portuguese, and its performance is similar to the state-of-the-art for
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)
In this paper we present LXGram, a general purpose grammar for the deep linguistic processing of Portuguese that delivers high precision grammatical analysis and detailed meaning representations. We present the main design features and evaluation results on the grammar’s coverage as well as its ability to produce correct grammatical analyses.
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)
In this paper we present a general purpose grammar for the deep linguistic processing of Portuguese that delivers high precision grammatical analysis and detailed meaning representations. We present the main design features and evaluation results concerning the grammar’s coverage as well as its ability to produce correct grammatical analyses.
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)