What is {spouse} of {Elizabeth Cady Stanton} that is {start time} is {1840-5-1} ?
Who did Elizabeth Cady Stanton marry on May 1,1840?
SELECT ?obj WHERE { wd:Q465335 p:P26 ?s . ?s ps:P26 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1840')) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q465335> .
?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> ?obj .
?statement <http://www.wikidata.org/entity/P580> <1840-5-1>
} 

On May 1, 1840 Whom did Elizabeth Cady Stanton married?.