Question: What is the date of death of Ruby Keeler's husband?
Sentence (from "Ruby Keeler"): Ethel Ruby Keeler (August 25, 1909 – February 28, 1993) was a Canadian-born American actress, dancer and singer most famous for her on-screen pairing with Dick Powell in a string of successful early musicals at Warner Brothers, particularly "42nd Street" (1933).
Relevant evidence: No