Conversation so far:
When did Memphis Minnie die?
Memphis Minnie spent her last years in the Jell Nursing Home, in Memphis, where she died of a stroke in 1973.
Is Memphis Minnie survived by anyone?
A headstone paid for by Bonnie Raitt was erected by the Mount Zion Memorial Fund on October 13, 1996, with 34 family members in attendance, including Memphis Minnie's sister Daisy.
What was the last thing Memphis Minnie did in her later life?
In 1958 Memphis Minnie played at a memorial concert for Big Bill Broonzy.

Question: Did she have any other major contributions before 1958?
Self-contained rewrite: Did Memphis Minnie have any other major contributions before playing at a memorial conert for Big Bill Broonzy in 1958?