Question: What is the date of death of the director of film Dirty Gertie From Harlem U.S.A.?
Sentence (from "Dirty Gertie from Harlem U.S.A."): Dirty Gertie from Harlem U.S.A. is a 1946 race film directed by Spencer Williams and produced and distributed by Sack Amusement Enterprises.
Relevant evidence: Yes