Complex sentence: Brendan Nelson became the first Catholic to lead the Liberal Party in 2007 and the current leader of the party, Tony Abbott, is a former seminarian who won the party leadership after defeating two other Catholic candidates for the post.
Split into simpler sentences: Brendan Nelson became the first Catholic to lead the Liberal Party in 2007. Former Prime Minister Tony Abbott was a seminarian who won the party leadership after defeating two other Catholic candidates for the post.