Question: The cover art for Johnny Griffin's album "The Congregation" was by an American artist who was a leading figure in the visual art movement known as what?
Sentence (from "Andy Warhol"): Some of his best known works include the silkscreen paintings "Campbell's Soup Cans" (1962) and "Marilyn Diptych" (1962), the experimental film "Chelsea Girls" (1966), and the multimedia events known as the "Exploding Plastic Inevitable" (1966–67).
Relevant evidence: No