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概要
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The purpose of this paper is to propose a method of paraphrasing a Japanese verbal noun phrase into a noun phrase in the form of "<I>N</I><SUB>1</SUB> <I>no</I> <I>N</I><SUB>2</SUB>". The semantic structure of "<I>N</I><SUB>1</SUB> <I>no</I> <I>N</I><SUB>2</SUB>" can be recognized by supplementing some abbreviated predicate. We deine "deletable verbs" as these abbreviated predicates in two ways. 1. Choose verbs equivalent to the semantic relations of "<I>N</I><SUB>1</SUB> <I>no</I> <I>N</I><SUB>2</SUB>" using a thesaurus. 2. Choose verbs associated with nouns. If a verb frequently cooccurs with a noun in newspaper articles, it is concluded that the verb is associated with the noun. By defining "deletable verbs" and utilizing a variety of the semantic structure of "<I>N</I><SUB>1</SUB> <I>no</I> <I>N</I><SUB>2</SUB>", this paraphrasing is accomplished. The subjective evaluation of our paraphrasing method shows that the precision is 63.8% and the recall is 61.4%. It is also shown that restriction on targets can increase the precision by 82.9%.
- 言語処理学会の論文
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