Complex sentence: New Democratic Party (NDP) leader Jack Layton was the Member of Parliament of the riding until his death on August 22,2011 has left the seat vacant pending a by-election which must be called within six months.
Split into simpler sentences: New Democratic Party (NDP) leader Jack Layton was the Member of Parliament of the riding until his death on August 22,2011. It left the seat vacant pending a by-election which must be called within six months.