Question: When did Charles Mintz's wife die?
Sentence (from "Charles Mintz"): Charles Bear Mintz (November 5, 1889 – December 30, 1939) was an American film producer and distributor, who assumed control over Margaret J. Winkler's Winkler Pictures after marrying her in 1924; the couple would have two children, Katherine and William.
Relevant evidence: Yes