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The AQUA Question Answering System uses two separate ontologically based systems in its operation. The first system, a knowledge-based information extraction system, derives the content from text documents (and queries) and converts them into an internal text meaning representation form (TMR). The second ontologically based system is the answer formulation unit, which maintains a separate ontology in a different form from the first. Answers produced by the answer formulation system are in Knowledge Interchange Format (KIF).