Question: What is the date of birth of Virginia Heinlein's husband?
Sentence (from "Virginia Heinlein"): Virginia "Ginny" Heinlein (April 22, 1916 – January 18, 2003), born Virginia Doris Gerstenfeld, was an American chemist, biochemist, engineer, and the third wife of Robert A. Heinlein, a prominent and successful author often considered as one of the "Big Three" of science fiction (along with Isaac Asimov and Arthur C. Clarke).
Relevant evidence: Yes