Overview of Question-Answering

Abstract

Question Answering is a hot research field in Natural Language Processing,which includes many kinds of NLP technology.This paper introduces the current research status and the methods that are often used in Question Answering.In general,a Question Answering system is made up of three parts:Question Analysis,Information Retrieval and Answer Extraction.This paper describes the main functions of these three parts and the common approach used in these parts in detail.At last,this paper introduces the evaluation of Question Answering system.