what is the {start time} for {José Luis Chila} has {member of sports team} as {C.A. Vélez Sarsfield} ?
On what date did C.A Velez Sarsfield begin playing Jose Luis Chila.
When did Jose Luis Chila start playing for C.A Velez Sarsfield?
SELECT ?x WHERE { resource:José_Luis_Chilavert property:member_of_sports_team ?g . ?g property:member_of_sports_team resource:C.A._Vélez_Sarsfield . ?g property:start_time ?x }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q216312> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P54> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q215163> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q216312 p:P54 ?s . ?s ps:P54 wd:Q215163 . ?s pq:P580 ?value}