3. The system as claimed in claim 1 , wherein a content source includes a knowledgebase (KB), said representative graph structure being generated from ontologies found in the KB.
3. The system as claimed in claim 1 , wherein a content source includes a knowledgebase (KB), said representative graph structure being generated from ontologies found in the KB. 4. The system as claimed in claim 3 , wherein said knowledgebase includes a medical knowledgebase.