what is the {start time} for {George Weah} has {member of sports team} as {Al Jazira Club} ?
During which time did George Weah start playing for the Al Jazira Club?
When did George Weah start playing for the Al Jazira Club?
SELECT ?f WHERE { ?h property:start_time ?f . ?h property:member_of_sports_team resource:Al_Jazira_Club . resource:George_Weah property:member_of_sports_team ?h }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q173139> .
?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/Q429630> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q173139 p:P54 ?s . ?s ps:P54 wd:Q429630 . ?s pq:P580 ?value}