what is the {start time} for {Carlo Ponti, Sr.} has {spouse} as {Giuliana Fiastri} ?
What year did Carlo Ponti Sr. and Guilana Fiastri marry?
When did Carlo Ponti Sr. marry Giuliana Fiastri
SELECT ?d WHERE { ?o property:start_time ?d . ?o property:spouse resource:Giuliana_Fiastri . resource:Carlo_Ponti property:spouse ?o }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q299419> .
?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/Q22808138> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q299419 p:P26 ?s . ?s ps:P26 wd:Q22808138 . ?s pq:P580 ?value}