Complex sentence: Frank Haigh is a professional rugby league footballer who played in the 1950s, and 1960s, playing at club level for Wakefield Trinity (Heritage № 610), and Keighley, as a, i.e. number 8 or 10.
Split into simpler sentences: Frank Haigh is a former professional rugby league footballer who played in the 1950s, and 1960s. He played at club level for Wakefield Trinity (Heritage № 610), and Keighley, as a, i.e. number 8 or 10.