Conversation so far:
What is Fats Domino's most famous song?
Fats Domino and producer Dave Bartholomew wrote The Fat Man; the record had sold a million copies by 1951.
When did Fats Domino leave Imperial?
Imperial Records was sold in early 1963, and Fat Domino left the label.

Question: Where did he go after he left Imperial?
Self-contained rewrite: Where did Fats Domino go after he left Imperial Records?