1. A method comprising: extracting, by a question answering (QA) system, a set of features from a current question; performing, by the QA system, a comparison between (a) said set of features from said current question and (b) a set of features from one or more previously-submitted questions; selecting, based on the comparison, an answer to said current question from a set of answers to said one or more previously-submitted questions; displaying said answer in conjunction with a set of user-submitted answers to said current question; receiving user input that rates at least one user-submitted answer of said user-submitted answers higher than said answer; identifying one or more characteristics of the at least one user-submitted answer that are different from said answer; based on the one or more characteristics, modifying one or more elements of the QA system; and wherein the method is performed by one or more computing devices.
1. A method comprising: extracting, by a question answering (QA) system, a set of features from a current question; performing, by the QA system, a comparison between (a) said set of features from said current question and (b) a set of features from one or more previously-submitted questions; selecting, based on the comparison, an answer to said current question from a set of answers to said one or more previously-submitted questions; displaying said answer in conjunction with a set of user-submitted answers to said current question; receiving user input that rates at least one user-submitted answer of said user-submitted answers higher than said answer; identifying one or more characteristics of the at least one user-submitted answer that are different from said answer; based on the one or more characteristics, modifying one or more elements of the QA system; and wherein the method is performed by one or more computing devices. 4. The method of claim 1 , wherein performing the comparison includes comparing the set of features from the current question to a set of index values associated with a knowledgebase of said QA system.