Questionscan be classified basedon their degree of difficulty. Asthe level of difficulty increases, question answeringsystemsneedto rely on richer semantic ontoiogies and larger knowledgebases. This paper is concernedwith questions whoseanswers are spread across several documentsand thus, require answerfusion. Tofind suchanswers, the systemneeds to developdomainspecific ontologies. Amethodis presentedfor on-line acquisition of ontological information fromthe documentcollection.
Roxana Girju, Dan I. Moldovan