If you have asked a series of questions in Axon, it's likely that your knowledge graph has become cluttered with answers. If you would like to narrow down your results to only those defined in an ontology, follow these steps.
Ask multiple questions in the search bar.
Once the answer nodes have populated the knowledge graph, click the Filter tab.
Click the box underneath Ontologies
Select the ontology you wish to work with. Only terms that are mentioned in this ontology will appear as answers in the knowledge graph.