Complex sentence: Thomas "Tommy" Rostron is an English professional rugby league footballer who played in the 1940s, playing at representative level for England, and at club level for Oldham, as a, i.e. number 13, during the era of contested scrums.
Split into simpler sentences: Thomas "Tommy" Rostron is an English former professional rugby league footballer who played in the 1940s. He played at representative level for England, and at club level for Oldham, as a, i.e. number 13, during the era of contested scrums.