Complex sentence: Bolingbroke, now called Old Bolingbroke, is a market town near Boston in Lincolnshire, England and the site of a historic castle, once owned by John of Gaunt.
Split into simpler sentences: Bolingbroke, now called Old Bolingbroke, is a market town near Boston in Lincolnshire, England. It is the site of a historic castle, once owned by John of Gaunt.