Question: What was Leonhard Euler a member of in 1741?
Paraphrase: Leonhard Euler was a member of what in 1741?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q7604 p:P463 ?s . ?s ps:P463 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1741')) }