Question: What are a few molluscas whose family is Buccinidae?
SPARQL:
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/family> <http://dbpedia.org/resource/Buccinidae>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Mollusca>}