Conversation so far:
When did Murray Rothbard get married?
He got married in 1953.
Who did Murray Rothbard marry?
He married JoAnn Schumacher (1928–1999), whom he called Joey, in New York City.
How long did Murray Rothbard and Joey stay married?
They were married from 1953 until his death in 1995.

Question: How did she die?
Self-contained rewrite: How did JoAnn Schumcacher die?