Protege 5.2 for creating an ontology

问题

I'm using Protege 5.2 right now. The SPARQL tab doesn't seem to work. Like the window for typing the query itself is not opening . Any idea where the mistake is ? Should I download anything more to do the querying ?

来源：https://stackoverflow.com/questions/43971310/protege-5-2-for-creating-an-ontology