what is the {start time} for {Marine Le Pen} has {member of political party} as {Rassemblement Bleu Marine} ?
Marine Le Pen became a member of the Rassemblement Blue Marine in what year?
In what year did Marine Le Pen become a member of the Rassemblement Bleu Marine?
SELECT ?u WHERE { ?p property:start_time ?u . resource:Marine_Le_Pen property:member_of_political_party ?p . ?p property:member_of_political_party resource:Rassemblement_Bleu_Marine }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q12927> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P102> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q3419877> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q12927 p:P102 ?s . ?s ps:P102 wd:Q3419877 . ?s pq:P580 ?value}