×

Question answering system, data search method, and computer program

  • US 20060282414A1
  • Filed: 12/12/2005
  • Published: 12/14/2006
  • Est. Priority Date: 06/10/2005
  • Status: Active Grant
First Claim
Patent Images

1. A question answering system comprising:

  • a question input unit that is input to a question;

    a search unit that executes search processing on a basis of the input question;

    an anaphoric analysis unit that executes anaphoric analysis processing on a search result of the search unit;

    an information extraction unit that extracts sentences, which include expressions having a reference relation therebetween, as reference relation sentences, the reference relation determined by finding relation in an expressions of at least one of a noun phrase, a pronoun, and a zero pronoun between sentences in the search result on a basis of a result of the anaphoric analysis executed by the anaphoric analysis unit, the information extraction unit that selects a first candidate sentence from a passage obtained as the search result and selects a second candidate sentence, which is the reference relation sentence of the first candidate sentence; and

    an answer candidate extraction unit that extracts an answer candidate from the first and second candidate sentences selected by the information extraction unit.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×