Definition: In this task you will be given a question and a passage. You need to determine if the answer to the question is contained in the passage. If the answer can be found in the passage you should output 'True'. If the answer cannot be found in the passage you should output 'False'.
Input: Passage: 'The Mamas & the Papas were an American folk rock vocal group that recorded and performed from 1965 to 1968, reuniting briefly in 1971. The group was composed of John Phillips, Denny Doherty, Cass Elliot, and Michelle Phillips née Gilliam. Their sound was based on vocal harmonies arranged by John Phillips, the songwriter, musician, and leader of the group who adapted folk to the new beat style of the early sixties.'. Question: 'when does a work enter the public domain'.

False