Complex sentence: He went back to Padua, where he studied hydraulics, moved in 1800 to the Netherlands, and in 1803 went to England, where he married an Englishwoman, Sarah Bane or Banne.
Split into simpler sentences: He went back to Padua, where he studied hydraulics, moved in 1800 to the Netherlands. In 1803 travelled to England, where he married an Englishwoman, Sarah Bane or Banne.