what is the {start time} for {Carlos Menem} has {spouse} as {Zulema Yoma} ?
Regarding the marriage between Carlos Menem and Zulema Yoma, when did it happen?
When did Carlos Menem marry Zulema Yoma?
SELECT ?h WHERE { ?y property:start_time ?h . resource:Carlos_Menem property:spouse ?y . ?y property:spouse resource:Zulema_Yoma }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q185107> .
?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/Q5551980> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q185107 p:P26 ?s . ?s ps:P26 wd:Q5551980 . ?s pq:P580 ?value}