Question: When did Milton Babbitt become a member of the American Academy of Arts an Letters?
Paraphrase: Mention the year in which Milton Babbitt was jointed to American Academy of Arts an Letters?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q318518 p:P463 ?s . ?s ps:P463 wd:Q463281 . ?s pq:P580 ?value}