A computer-implemented method includes receiving a question set. The question set is for a question answer system. The method receives a plurality of domain cluster topics. The plurality of domain cluster topics are for the question set. The method organizes the question set based on the plurality of domain cluster topics to yield a plurality of question set topics. The method receives a document corpus. The document corpus is for the question answer system. The method organizes the document corpus based on the plurality of domain cluster topics to yield a plurality of document corpus topics. The method maps the plurality of question set topics to the plurality of document corpus topics. The method determines whether any of the plurality of question set topics are unmatched. The method is responsive to any of the plurality of question set topics being unmatched. The method requests enrichment for the document corpus.