Experiments of FX for NTCIR-9 RITE Japanese BC Subtask

We report results and analyses of our experiments for NTCIR-9 RITE Japanese BC subtask we have participated in. It is assumed that the RTE task can be analyzed at some level of accuracy with a simple string-based method using word coverage, although the task seems to require advanced natural language understanding. On the other hand, if you try to tackle the task in the manner to follow your intuition, you should consider at least syntactic features of the texts. However, it is difficult in general to obtain better results for textual inference (TI) with syntactic analysis rather than with word-level analysis. In this paper, we explain our TI method based on syntactic and semantic relations of words in the texts, and conduct experiments