Question: How many molluscas are there whose families are Buccinidae and Buccinoidea?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
 SELECT DISTINCT COUNT(?uri) WHERE { ?uri onto:family <http://dbpedia.org/resource/Buccinidae> . ?uri onto:family <http://dbpedia.org/resource/Buccinoidea>}