Conversation so far:
What happened in 2011?
In January 2011, a slimmer, trimmer Pistorius won three IPC Athletics World titles.
What events did he win?
He subsequently won the T44 400 metres in 47.28 seconds.

Question: What was the second event he won?
Self-contained rewrite: What was the second event  Oscar Pistorius won in 2011?