Complex sentence: Walter Mooney was a professional rugby league footballer who played in the 1920s, playing at representative level for Great Britain, and at club level for Leigh, as a, i.e. number 6.
Split into simpler sentences: Walter Mooney was a professional rugby league footballer who played in the 1920s. He played at representative level for Great Britain, and at club level for Leigh, as a, i.e. number 6.