what is the {start time} for {Ann Dunham} has {spouse} as {Lolo Soetoro} ?
What was the date on which Ann Dunham married to Lolo Soetoro?
When was Ann Dunham married to Lolo Soetoro?
SELECT ?b WHERE { resource:Ann_Dunham property:spouse ?w . ?w property:spouse resource:Lolo_Soetoro . ?w property:start_time ?b }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q766106> .
?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/Q4115068> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q766106 p:P26 ?s . ?s ps:P26 wd:Q4115068 . ?s pq:P580 ?value}