Complex sentence: Stan Nicholson is a professional rugby league footballer who played in the 1950s, 1960s, and 1970s, playing at club level for Featherstone Rovers (Heritage № 404).
Split into simpler sentences: Stan Nicholson is a former professional rugby league footballer who played in the 1950s, 1960s, and 1970s. He played at club level for Featherstone Rovers (Heritage № 404).