Complex sentence: Harry Millington was an English professional rugby league footballer who played in the 1920s, 1930s, and 1940s, playing at representative level for England, and at club level for Widnes, as a, i.e. number 13.
Split into simpler sentences: Harry Millington was an English professional rugby league footballer who played in the 1920s, 1930s, and 1940s. He played at representative level for England, and at club level for Widnes, as a, i.e. number 13.