Complex sentence: Alan Tennant was an English professional rugby league footballer who played in the 1940s, and 1950s, playing at club level for Featherstone Rovers (Heritage № 301), as a, i.e. number 3 or 4.
Split into simpler sentences: Alan Tennant was an English professional rugby league footballer who played in the 1940s, and 1950s. He played at club level for Featherstone Rovers (Heritage № 301), as a, i.e. number 3 or 4.