what is the {end time} for {Alexander Graham Bell} has {spouse} as {Mabel Gardiner Hubbard} ?
Around what time did Alexander Graham Bell separate from Mabel Gardiner Hubbard?
When did Alexander Graham Bell divorce from Mabel Gardiner Hubbard?
SELECT ?o WHERE { resource:Alexander_Graham_Bell property:spouse ?x . ?x property:end_time ?o . ?x property:spouse resource:Mabel_Gardiner_Hubbard }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q34286> .
?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/Q6721445> .
?statement <http://www.wikidata.org/entity/P582> ?value. 
} 

SELECT ?value WHERE { wd:Q34286 p:P26 ?s . ?s ps:P26 wd:Q6721445 . ?s pq:P582 ?value}