Question Answering systems, unlike other Information Retrieval systems, aim at providing directly the answer to the user, and not a list of documents in which the correct answer may be found. Our system is based on Data Warehouses and provides composite answers made of data tables and corresponding chart visualizations for Business Intelligence purposes. The question translation step is based on a new proposal for surface patterns that incorporate business semantic as well as domain-speci c knowledge allowing a better coverage of questions.