acl acl2013 acl2013-113 acl2013-113-reference knowledge-graph by maker-knowledge-mining
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Author: Sebastian Pado ; Jan Snajder ; Britta Zeller
Abstract: Syntax-based vector spaces are used widely in lexical semantics and are more versatile than word-based spaces (Baroni and Lenci, 2010). However, they are also sparse, with resulting reliability and coverage problems. We address this problem by derivational smoothing, which uses knowledge about derivationally related words (oldish → old) to improve semantic similarity est→imates. We develop a set of derivational smoothing methods and evaluate them on two lexical semantics tasks in German. Even for models built from very large corpora, simple derivational smoothing can improve coverage considerably.
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