The interpretation of a multiple-domain text corpus as a single ontology leads to misconceptions. This is because some concepts may be syntactically equal; though, they are semantically lopsided in different domains. Also, the occurrences of a domain concept in a large multipledomain corpus may not gauge correctly the concept significance. This paper tackles the mentioned problems and proposes a novel ontology builder to extract separate domain specific ontologies from such a corpus. The builder contribution is to sustain each domain specific concepts and relations to get precise answers for user questions. We extend a single ontology builder named Text2Onto to apply our thought. We fruitfully enhance it to answer, more precisely, questions on a subset of AQUAINT corpus.