What is {end time} and {start time} of {{Guglielmo Marconi} has {spouse} as {Beatrice O'Brien}}
What is the  end time and start time of Guglielmo Marconi whose wife is like  Beatrice O'Brien
When is {end time} and {start time} of {{Guglielmo Marconi} whose {spouse} as {Beatrice O'Brien}}?
SELECT ?u ?p WHERE { ?h property:start_time ?p . ?h property:spouse resource:Beatrice Marconi . resource:Guglielmo_Marconi property:spouse ?h . ?h property:end_time ?u }
select distinct ?value1 ?value2 where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q36488> . ?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/Q22230905>. ?statement <http://www.wikidata.org/entity/P580> ?value1 . ?statement <http://www.wikidata.org/entity/P2842> ?value2 } 
SELECT ?value1 ?value2 WHERE { wd:Q36488 p:P26 ?s . ?s ps:P26 wd:Q22230905 . ?s pq:P582 ?value1 . ?s pq:P580 ?value2 }