Question: Give me the count of interests of the philosopher whose primary interest is Metaphysics ?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
SELECT DISTINCT COUNT(?uri) WHERE { ?x prop:mainInterests <http://dbpedia.org/resource/Metaphysics> . ?x prop:mainInterests ?uri }