Complex sentence: Reith joined the Liberal Party in a by-election in December 1982, caused by the resignation of Sir Phillip Lynch, he was elected to the House of Representatives to represent the seat of Flinders.
Split into simpler sentences: Reith joined the Liberal Party in a by-election in December 1982, caused by the resignation of Sir Phillip Lynch. He was elected to the House of Representatives to represent the seat of Flinders.