what is the {start time} for {Hal B. Wallis} has {spouse} as {Louise Fazenda} ?
When did Louise Fazenda and Hal B. Wallis marry?
In what year did Hal B. Wallis marry Louise Fazenda?
SELECT ?n WHERE { resource:Hal_B._Wallis property:spouse ?e . ?e property:start_time ?n . ?e property:spouse resource:Louise_Fazenda }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q472520> .
?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/Q450986> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q472520 p:P26 ?s . ?s ps:P26 wd:Q450986 . ?s pq:P580 ?value}