Question: Count all american football players whose former team owns Lucas Oil Stadium ?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT COUNT(?uri) WHERE { ?x prop:city <http://dbpedia.org/resource/Lucas_Oil_Stadium> . ?uri onto:formerTeam ?x  . ?uri rdf:type onto:AmericanFootballPlayer}