Complex sentence: Ian Stenton is a professional rugby league footballer who played in the 1960s, and 1970s, playing at representative level for Yorkshire, and at club level for Castleford, as a, i.e. number 3 or 4.
Split into simpler sentences: Ian Stenton is a former professional rugby league footballer who played in the 1960s, and 1970s. He played at representative level for Yorkshire, and at club level for Castleford, as a, i.e. number 3 or 4.