what is the {start time} for {Marcel Dassault} has {position held} as {member of the French National Assembly} ?
On which date did Marcel Dassault  became a member of the the French National Assembly?
When did Marcel Dassault become a member of the French National Assembly?
SELECT ?r WHERE { ?g property:position_held resource:member_of_the_French_National_Assembly . resource:Marcel_Dassault property:position_held ?g . ?g property:start_time ?r }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q160802> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P39> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q3044918> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q160802 p:P39 ?s . ?s ps:P39 wd:Q3044918 . ?s pq:P580 ?value}