Question: Is Maria Sharapova the silver medalist of Tennis at the 2012 Summer Olympics  Women's singles?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
ASK WHERE { <http://dbpedia.org/resource/Tennis_at_the_2012_Summer_Olympics_–_Women's_singles> onto:silverMedalist <http://dbpedia.org/resource/Maria_Sharapova> }