Complex sentence: Charles "Charlie" Agar was a professional rugby league footballer who played in the 1910s, and 1920s, playing at club level for Wakefield Trinity (Heritage № 230), as a, i.e. number 11 or 12.
Split into simpler sentences: Charles "Charlie" Agar was a professional rugby league footballer who played in the 1910s, and 1920s. He played at club level for Wakefield Trinity (Heritage № 230), as a, i.e. number 11 or 12.