Complex sentence: Charles's parents were enterprising shop-keepers originally from the Northamptonshire town of Wellingborough who claimed among their forebears the 16th century printer of Bibles Christopher Barker and the botanist Joseph Banks.
Split into simpler sentences: Charles's parents were enterprising shop-keepers originally from the Northamptonshire town of Wellingborough. Knight claimed among his antecedents the 16th century printer of Bibles Christopher Barker and the botanist Joseph Banks.