Conversation so far:
When was the Triple Crown race Affirmed won?
Affirmed won the Triple Crown race in 1978.
Are there any other interesting aspects about the race horse Affirmed article?
Affirmed was also known for his famous rivalry with Alydar, whom he met ten times, including in all three Triple Crown races.

Question: What did he do after the triple crown?
Self-contained rewrite: What did the race horseAffirmed do after winning the triple crown in 1978?