Complex sentence: Charles Peter Kennedy (born 25 November 1959) is a British politician; from 9 August 1999 until 7 January 2006, he was the Leader of the Liberal Democrats, the third largest political party in the United Kingdom.
Split into simpler sentences: Charles Peter Kennedy (born 25 November 1959) is a British politician. From 9 August 1999 until 7 January 2006, he was the Leader of the Liberal Democrats, the third largest political party in the United Kingdom.