Automatic Expansion of Equivalent Sentence Set Based on Syntactic Substitution

In this paper, we propose an automatic quantitative expansion method for a sentence set that contains sentences of the same meaning (called an equivalent sentence set). This task is regarded as paraphrasing. The features of our method are: 1) The paraphrasing rules are dynamically acquired by Hierarchical Phrase Alignment from the equivalent sentence set, and 2) A large equivalent sentence set is generated by substituting source syntactic structures. Our experiments show that 561 sentences on average are correctly generated from 8.48 equivalent sentences.

• Type: Conference
• Year: 2003
• Where: NAACL
• Authors: Kenji Imamura, Yasuhiro Akiba, Eiichiro Sumita
• Keywords: Equivalent Sentence Set, Large Equivalent Sentence, NAACL 2003, NAACL 2007, Quantitative Expansion Method