Complex sentence: Christopher "Chris" Johnson is a professional rugby league footballer who played in the 1980s, and 1990s, playing at representative level for Great Britain, and at club level for Leigh, and Swinton, as a, i.e. number 1.
Split into simpler sentences: Christopher "Chris" Johnson is a former professional rugby league footballer who played in the 1980s, and 1990s. He played at representative level for Great Britain, and at club level for Leigh, and Swinton, as a, i.e. number 1.