5. The system as claimed in claim 3 , wherein said created graph structure is an undirected graph generated from ontologies found in the KB, said created graph showing the relations of concepts weighted by a number of relations, wherein each edge between related concepts is a weight representing the number of relations.
5. The system as claimed in claim 3 , wherein said created graph structure is an undirected graph generated from ontologies found in the KB, said created graph showing the relations of concepts weighted by a number of relations, wherein each edge between related concepts is a weight representing the number of relations. 7. The system as claimed in claim 5 , wherein to derive said undirected graph, said processor device is further configured to: collapse each of different relations between concepts in the knowledge base.