Complex sentence: Noonan resigned as Fine Gael leader on the night of the election, and was replaced by Enda Kenny, the runner-up to Noonan in the 2001 leadership election.
Split into simpler sentences: Noonan resigned as Fine Gael leader on the night of the election. He was replaced by Enda Kenny, the runner-up to Noonan in the 2001 leadership election.