ASK WHERE { <http://dbpedia.org/resource/Robert_Boyle> <http://dbpedia.org/ontology/field> <http://dbpedia.org/resource/Chemistry> }
Is Robert Boyle a chemist?
ASK WHERE { resource:Robert_Boyle property:field resource:Chemistry }
Yes
[Yes], Chemistry is the field of Robert Boyle.
Yes, this is Robert Boyle territory.
[Yes], Chemistry is the field of him.
Yes, that's his specialty.