Question: When did the performer of song Dream A Little Dream Of Me die?
Sentence (from "Cass Elliot"): Cass Elliot (born Ellen Naomi Cohen; September 19, 1941 – July 29, 1974), also known as Mama Cass, was an American singer and actress who is best known for having been a member of the Mamas and the Papas.
Relevant evidence: Yes