Conversation so far:
Did Nelson get married?
Willie Nelson has married four times.
Who was he married too?
His first marriage was to Martha Matthews.
When were they married?
it lasted from 1952 to 1962.
Who was his second wife?
Nelson's next marriage was to Shirley Collie.

Question: When were they married?
Self-contained rewrite: When were Shirley Collie and Willie Nelson married?