Complex sentence: Stephen "Steve" Hartley is a professional rugby league footballer who played in the 1970s, and 1980s, playing at representative level for Great Britain, and at club level for Hull Kingston Rovers, as a, i.e. number 6.
Split into simpler sentences: Stephen "Steve" Hartley is a former professional rugby league footballer who played in the 1970s, and 1980s. He played at representative level for Great Britain, and at club level for Hull Kingston Rovers, as a, i.e. number 6.