Where were the sportsmen born, who started their careers with Homestead Grays?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/debutteam> <http://dbpedia.org/resource/Homestead_Grays> . ?x <http://dbpedia.org/property/birthDate> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Athlete>}
Homestead_Grays