10. The computer program product of claim 9 , wherein traversing the given path in the ontology comprises: instantiating a source node of the given path with a known fact in the set of known facts; and instantiating an unknown argument of each relationship in the given path based on the at least one candidate answer.
10. The computer program product of claim 9 , wherein traversing the given path in the ontology comprises: instantiating a source node of the given path with a known fact in the set of known facts; and instantiating an unknown argument of each relationship in the given path based on the at least one candidate answer. 11. The computer program product of claim 10 , wherein instantiating the unknown argument of each relationship in the given path comprises looking up the relationship in a database or knowledge base.