1.3 ANSWER TYPE CLASSIFICATION RETRIEVAL SYSTEM IS TO RETRIEVE ACC...

2.1.3 Answer Type Classification

retrieval system is to retrieve accurate results in response to a query submitted by the user, and to rank these results Answer type classification is a subsequent and related according to their relevancy. component to question classification. It is based on a mapping One thing to be considered is that it is not desirable in QA of the question classification. Once a question has been systems to rely on IR systems which use the cosine vector classified, a simple rule based mapping would be used to space model for measuring similarity between documents and determine the potential answer types. Again, because question queries. This is mainly because a QA system usually wants classification can be ambiguous, the system should allow for documents to be retrieved only when all keywords are present multiple answer types. in the document. This is because the keywords have been carefully selected and reformulated by the Question