Question: In what year did Thornton Wilder write his three-act play that would later be compared to Neil Young's Greendale?
Sentence (from "Our Town (opera)"): The opera was commissioned by Indiana University, Opera Boston, the Aspen Music Festival and School, North Carolina School of the Arts, Lake George Opera in Saratoga Springs, N.Y., and Festival Opera in Walnut Creek, Calif.
Relevant evidence: No