Complex sentence: The Tories lost the 2003 general election, but Munro was able to retain her seat by a reduced margin, and became the opposition critic of Ministry of Community and Social Services (Ontario) and Minister Madeleine Meilleur.
Split into simpler sentences: The Tories lost the 2003 general election, although Munro was able to retain her seat by a reduced margin. She is the opposition critic of Ministry of Community and Social Services (Ontario) and Minister Madeleine Meilleur.