User activity for 45′ / 34′46.776″ / 31′57.9864″ / 27′10.554″ / 26′1.1499″ / 4′33″ / Music for Fiv… (1991) by John Cage; Eberhard Blum, Marianne Schroeder, Robyn Schulkowsky, Frances-Marie Uitti, Nils Vigeland