Complex sentence: Bill Hartley (26 October 1930-18 February 2006) was an Australian political activist, who was the State Secretary of the Victorian branch of the Australian Labor Party and a leading figure within its Socialist Left faction until his expulsion in 1986.
Split into simpler sentences: Bill Hartley (26 October 1930-18 February 2006) was an Australian political activist. Hartley became a leading figure within the Victorian ALP's Socialist Left faction until his expulsion in 1986.