Complex sentence: British Census 1881 RG11 3430/66 p20 Hancock made his debut for Derbyshire aged 20 in May 1897 against Lancashire when he took 4 wickets at a cost of 140 runs.
Split into simpler sentences: British Census 1881 RG11 3430/66 p20 Hancock made his debut for Derbyshire in the 1897 season aged 20. In May against Lancashire he took 4 wickets at a cost of 140 runs.