9. A method to identify changes in evidence used to answer questions by a question answering system, the method comprising: identifying a first evidence related to a feature, wherein the question answering system has identified the feature as being relevant to answering a first type of question of a plurality of types of questions; generating an updated response for the first question based on the changed first evidence responsive to: (i) detecting a change in the first evidence, and (ii) determining that a confidence score of a first response generated for a first question, of the first type of question, exceeds a confidence threshold; and notifying a user of the change in the first evidence, wherein the updated response is generated upon approval of the user.
9. A method to identify changes in evidence used to answer questions by a question answering system, the method comprising: identifying a first evidence related to a feature, wherein the question answering system has identified the feature as being relevant to answering a first type of question of a plurality of types of questions; generating an updated response for the first question based on the changed first evidence responsive to: (i) detecting a change in the first evidence, and (ii) determining that a confidence score of a first response generated for a first question, of the first type of question, exceeds a confidence threshold; and notifying a user of the change in the first evidence, wherein the updated response is generated upon approval of the user. 10. The method of claim 9 , further comprising monitoring the first evidence to detect the change.