Complex sentence: Tom Rees was a British professional rugby league footballer who played in the 1920s, 1930s, and 1940s, playing at representative level for Great Britain, and at club level for Oldham, and Broughton Rangers, playing at, i.e. number 1.
Split into simpler sentences: Tom Rees was a British professional rugby league footballer who played in the 1920s, 1930s, and 1940s. He played at representative level for Great Britain, and at club level for Oldham, and Broughton Rangers, playing at, i.e. number 1.