Complex sentence: His mother, Maria, married John Gisborne (or Gisbourne) after the death of Reveley in 1799 the family went to live in Pisa, Italy, where he graduated as a civil engineer at the University of Pisa.
Split into simpler sentences: His mother, Maria, married John Gisborne (or Gisbourne) after the death of Reveley. In 1799 the family went to live in Pisa, Italy, where he graduated as a civil engineer at the University of Pisa.