Conversation so far:
Was Affirmed the favorite in the Kentucky Derby?
Alydar was made the 6-5 favorite for Kentucky Derby, with Affirmed the second choice at 9-5.
Was the 1978 Kentucky Derby with Affirmed a close race?
Affirmed won the Kentucky Derby by 1 1⁄2 lengths.
How much did Affirmed win the Preakness by?
Affirmed held a short lead entering the stretch and held it to defeat Alydar by a neck.
Was the 1978 Belmont with Affirmed a close race as well?
Affirmed rallied in the final stride to win by a nose.

Question: Does the Triple Crown happen often?
Self-contained rewrite: Does the Triple Crown happen often?