Question: How many players participated in the 2004-05 FC Barcelona season?
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 { <http://dbpedia.org/resource/2004–05_FC_Barcelona_season> prop:name ?uri  . ?uri rdf:type onto:SoccerPlayer}