Conversation so far:
What was the biggest race Affirmed won in 1977?
In the Hopeful Stakes, Affirmed pulled away in the final sixteenth of a mile to win by half a length.
What was Affirmed's time in the 1977 Hopeful Stakes?
Affirmed's time of 1:152⁄5 for 6 1⁄2 furlongs was a new stakes record.

Question: How fast did he run at the Belmont Park?
Self-contained rewrite: How fast did Affirmed run at the Belmont Park?