Complex sentence: In December 2009 Abbott defeated Turnbull by 42 votes to 41 to become the party's leader and Leader of the Opposition, and led the Liberal/National coalition to the 2010 federal election where a hung parliament was the outcome.
Split into simpler sentences: In December 2009 Abbott defeated Turnbull by 42 votes to 41 to become the party's leader and Leader of the Opposition. Abbott led the Liberal/National coalition to the 2010 federal election where a hung parliament was the outcome.