TAILIEUCHUNG - Báo cáo khoa học: "Towards a Semantic Classification of Spanish Verbs Based on Subcategorisation Information"

We present experiments aiming at an automatic classification of Spanish verbs into lexical semantic classes. We apply well-known techniques that have been developed for the English language to Spanish, proving that empirical methods can be re-used through languages without substantial changes in the methodology. | Towards a Semantic Classification of Spanish Verbs Based on Subcategorisation Information Eva Esteve Ferrer Department of Informatics University of Sussex Brighton BN1 9QH UK Abstract We present experiments aiming at an automatic classification of Spanish verbs into lexical semantic classes. We apply well-known techniques that have been developed for the English language to Spanish proving that empirical methods can be re-used through languages without substantial changes in the methodology. Our results on subcategorisation acquisition compare favourably to the state of the art for English. For the verb classification task we use a hierarchical clustering algorithm and we compare the output clusters to a manually constructed classification. 1 Introduction Lexical semantic classes group together words that have a similar meaning. Knowledge about verbs is especially important since verbs are the primary means of structuring and conveying meaning in sentences. Manually built semantic classifications of English verbs have been used for different applications such as machine translation Dorr 1997 verb subcategorisation acquisition Korhonen 2002a or parsing Schneider 2003 . Levin 1993 has established a large-scale classification of English verbs based on the hypothesis that the meaning of a verb and its syntactic behaviour are related and therefore semantic information can be induced from the syntactic behaviour of the verb. A classification of Spanish verbs based on the same hypothesis has been developed by Vazquez et al. 2000 . But manually constructing large-scale verb classifications is a labour-intensive task. For this reason various methods for automatically classifying verbs using machine learning techniques have been attempted Merlo and Stevenson 2001 Stevenson and Joa-nis 2003 Schulte im Walde 2003 . In this article we present experiments aiming at automatically classifying Spanish verbs into lexical semantic classes based on their .

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