Conversation so far:
What can you tell me about the Patterson vs Johansson fight?
Patterson met Ingemar Johansson in three fights.
How did Floyd Patterson do in the Patterson vs Johansson fight?
Fight one winner was Johansson. Fight two winner was Patterson . Fight three winner was Patterson.

Question: Why was the fight stopped?
Self-contained rewrite: Why was the Patterson vs. Johnsson fight stopped?