Complex sentence: In 1996, she campaigned for Greens leader Bob Brown, and in 2004, she joined the Australian Greens, citing that they were more capable of achieving the function of a third force in Australian politics.
Split into simpler sentences: In 1996, she campaigned for Greens leader Bob Brown. In 2004, she joined the Australian Greens, citing that they were more capable of achieving the function of a third force in Australian politics.