20. The apparatus of claim 19 , wherein: the website classifications include at least one classification type selected from the group consisting of entity type, service type, information type, sector type, location, and time period; and the credibility values is for a credulity based on at least one of feedback on answer accuracy, information closeness, and a number of links from other websites in the group to the website.
19. An apparatus for determining an answer to a query, comprising: a memory, comprising: a website index database comprising website classifications for websites and weights assigned to the website classifications for the websites; and a credibility database comprising credibility values for the websites; a processor configured to: receiving keywords in the query; determining query specifications from the keywords, the query specifications being website classifications of websites that may contain an answer to the query; determining a group of websites based on the query specifications and the website classifications of the websites in the website index database; selecting a website from the group based on the credibility values of the websites in the credibility database; searching web pages of the website for the answer; selecting the answer from the web pages; and transmitting the answer.