what is the {start time} for {H. G. Wells} has {spouse} as {Amy Catherine Robbins} ?
H. G. Wells was the spouse of Amy Catherine Robbins during what time?
When was H. G. Wells the spouse of Amy Catherine Robbins?
SELECT ?i WHERE { resource:H._G._Wells property:spouse ?y . ?y property:start_time ?i . ?y property:spouse resource:Amy_Catherine_Robbins }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q42511> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P26> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q17759463> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q42511 p:P26 ?s . ?s ps:P26 wd:Q17759463 . ?s pq:P580 ?value}