Complex sentence: John Abernethy (April 3,1764-April 20,1831), was an English surgeon, the grandson of Reverend John Abernethy, was born in London, where his father was a merchant.
Split into simpler sentences: John Abernethy (April 3,1764-April 20,1831) was an English surgeon, the grandson of Reverend John Abernethy. He was born in London, where his father was a merchant.