Complex sentence: Iain McKenzie (born 4 April 1959) is a Scottish Labour politician, who has been the Member of Parliament for Inverclyde since June 2011, when he won the by-election caused by the death of David Cairns, who had represented the constituency since 2001.
Split into simpler sentences: Iain McKenzie (born 4 April 1959) is a Scottish Labour politician, who has been the Member of Parliament for Inverclyde since the June 2011 by-election in his constituency. McKenzie's election followed the death of David Cairns, who had represented the constituency since 2001.