Complex sentence: Thomas Parker was a Welsh professional rugby league footballer who played in the 1920s, and 1930s, playing at representative level for Wales, and at club level for Wigan, as a, i.e. number 3 or 4.
Split into simpler sentences: Thomas Parker was a Welsh professional rugby league footballer who played in the 1920s, and 1930s. He played at representative level for Wales, and at club level for Wigan, as a, i.e. number 3 or 4.