what is the {start time} for {Althea Gibson} has {member of sports team} as {United States Wightman Cup team} ?
What year was Althea Gibson a part of the US Wightman Cup team?
When was Althea Gibson a member of the United States Wightman Cup team?
SELECT ?t WHERE { ?j property:member_of_sports_team resource:United_States_Wightman_Cup_team . resource:Althea_Gibson property:member_of_sports_team ?j . ?j property:start_time ?t }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q53550> .
?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/Q7892299> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q53550 p:P54 ?s . ?s ps:P54 wd:Q7892299 . ?s pq:P580 ?value}