RICOH at SemEval-2016 task 1: IR-based semantic textual similarity estimation

Abstract

This paper describes our IR (Information Retrieval) based method for SemEval 2016 task 1, Semantic Textual Similarity (STS). The main feature of our approach is to extend a conventional IR-based scheme by incorporating word alignment information. This enables us to develop a more fine-grained similarity measurement. In the evaluation results, we have seen that the proposed method improves upon a conventional IR-based method on average. In addition, one of our submissions achieved the best performance for the "postediting" data set.