Complex sentence: Paul O'Brien is an Australian professional rugby league footballer who played in the 1970s, playing at club level for South Sydney Rabbitohs, and Wakefield Trinity (Heritage № 821), as, i.e. number 3 or 4.
Split into simpler sentences: Paul O'Brien is an Australian professional rugby league footballer who played in the 1970s. He played at club level for South Sydney Rabbitohs, and Wakefield Trinity (Heritage № 821), as, i.e. number 3 or 4.