“…The last type is using only a readymade ontology, these are ontologies made for a specific domain(s) by different organizations or people, which can be used by researchers saving time and effort as in [1,2,4,8,9,12,19]. Training dataset is being subjected to a readymade ontology in [1,2,4,8,12], with the difference between them in the kind of ontology used.…”