Complex sentence: Burton Abbey at Burton upon Trent in Staffordshire, England, was originally founded in the 7th or 9th century by St Modwen or Modwenna; and later refounded in 1003 as a Benedictine abbey by Wulfric Spott, a thegn possibly descended from King Alfred.
Split into simpler sentences: Burton Abbey at Burton upon Trent in Staffordshire, England, was founded in the 7th or 9th century by St Modwen or Modwenna. It was refounded in 1003 as a Benedictine abbey by Wulfric Spott, a thegn possibly descended from King Alfred.