instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Which rank of the peerage is directly below a duke?
answer:
duke


question:
To which actress is Daniel Craig married?
answer:
daniel craig


question:
Arshile Gorky, Willem de Kooning, Franz Kline, Mark Rothko, Philip Guston, Hans Hofmann, Clyfford Still, Barnett Newman, Ad Reinhardt, Richard Pousette-Dart, Robert Motherwell, Peter Voulkos & Jackson Pollock painted in what style?
answer:

peter voulkos