Entity answer extraction in field of tourism.

For the restricted domain,an answer extraction method based on pattern matching and named entity recognition is presented.The answer pattern was defined with pattern string,pattern weight and answer type,and in accordance with the definition,the answer pattern base was constructed.The entity answer extracting system in the field of tourism was implemented by the answer extraction method based on pattern matching and named entity recognition.The results of latest experiments show that the average recalling rate of the new method reaches 88.78 percent,and the average accuracy rate of that reaches 86.04 percent.