Conversation so far:
When did Frank Zappa's childhood begin?
Frank Zappa was born on December 21, 1940, in Baltimore, Maryland.
When did Frank Zappa die?
Frank Zappa died from prostate cancer on December 4, 1993.
Where did Frank Zappa live for the most part of his life?
Zappa and the Mothers of Invention returned to Los Angeles in mid-1968, on Woodrow Wilson Drive. This was Zappa's home for the rest of his life.
Did Frank Zappa die in California as well?
Frank Zappa died 17 days before his 53rd birthday at his home in Los Angeles with his wife and children by his side.

Question: what was his big accomplishment
Self-contained rewrite: What was Frank Zappa's big accomplishment?