Question: When was Kathryn Grayson of the 1946 American musical comedy, Ziegfeld Follies, under contract to Metro-Goldwyn-Mayer?
Sentence (from "Ziegfeld Follies (film)"): Ziegfeld Follies is a 1946 American musical comedy film released by Metro-Goldwyn-Mayer and directed by Lemuel Ayers, Roy Del Ruth, Robert Lewis, Vincente Minnelli, Merrill Pye, George Sidney and Charles Walters.
Relevant evidence: Yes