Complex sentence: Ravenspurn was a town in the East Riding of Yorkshire, England, which was lost due to coastal erosion, one of more than 30 along the Holderness Coast which have been lost to the North Sea since the 1800s.
Split into simpler sentences: Ravenspurn was an old East Riding of Yorkshire town, in England, which was lost due to coastal erosion. The town is one of more than 30 along the Holderness Coast which have been lost to the North Sea since the 1800s.