Question: What subject of Andy Warhol's film "Sleep" has sat in on  Bernadette Mayer's workshopts?
Sentence (from "Bernadette Mayer"): Mayer taught at the New School for Social Research, where she earned her degree in 1967, and, during the 1970s, she led a number of workshops at the Poetry Project at St. Mark's Church in New York.
Relevant evidence: No