Complex sentence: Wilkinson was born at Pottersbury, Northamptonshire, England, the fourth son of David Wilkinson, C.E., who was associated with George Stephenson in the production of early locomotives.
Split into simpler sentences: Wilkinson was born at Pottersbury, Northamptonshire, England. He was the fourth son of David Wilkinson, C.E., who was associated with Stephenson in the production of early locomotives.