RALI Experiments in IR4QA at NTCIR-7

In this report, we examine what information retrieval techniques can help identify documents that contain answers to different types of question. In particular, we exploit different external resource according to the type of question. In particular, Wikipedia will be exploited for identifying personal names and their translation, as well as biography-related keywords. Google search engine is used to identify additional translations of personal names. Our experiments show that these techniques can significantly increase retrieval effectiveness.