what is the {start time} for {Eddie Murphy} has {partner} as {Melanie Brown} ?
When did Eddie Murphy and Melanie Brown begin their relationship?
SELECT ?value WHERE { wd:Q43874 p:P451 ?s . ?s ps:P451 wd:Q236005 . ?s pq:P580 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q43874> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P451> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q236005> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

on what date did Eddie Murphy and Melanie Brown begin their relationship