Question: When was Kathryn Grayson of the 1946 American musical comedy, Ziegfeld Follies, under contract to Metro-Goldwyn-Mayer?
Sentence (from "Kathryn Grayson"): Kathryn Grayson (February 9, 1922 – February 17, 2010) was an American actress and coloratura soprano.
Relevant evidence: Yes