28. The method of claim 25 further comprising receiving the natural language question from a voice recognition system configured to translate spoken input to the natural language question.
25. A computer-implemented method for providing access to a knowledge base, comprising: receiving a natural language question as input; transmitting the natural language question to the knowledge base for translation to an internal query that represents an interpretation of the natural language question and has an internal format compatible with structured data of the knowledge base, the structured data representing first knowledge; and presenting a definitive natural language answer responsive to the natural language question received from the knowledge base and including second knowledge derived from the first knowledge in response to the internal query, the second knowledge not having been stored in the knowledge base prior to transmission of the natural language question to the knowledge base.