What is {member of} of {Leonhard Euler} that is {start time} is {1741-0-0} ?
Leonhard Euler was a member of what in 1741?
What was Leonhard Euler a member of in 1741?
SELECT ?q WHERE { resource:Leonhard_Euler property:member_of ?r . FILTER ( CONTAINS ( YEAR ( ?b ) , '1741' ) ) . ?r property:member_of ?q . ?r property:start_time ?b }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q7604> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P463> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <1741-0-0>
} 

SELECT ?obj WHERE { wd:Q7604 p:P463 ?s . ?s ps:P463 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1741')) }