Complex sentence: Allan Cunningham (December 7,1784-October 30,1842), Scottish poet and man of letters, was born at Keir, Dumfriesshire, and began life as a stone mason's apprentice.
Split into simpler sentences: Allan Cunningham (December 7,1784-October 30,1842) was a Scottish poet and author. He was born at Keir, Dumfriesshire, and first worked as a stone mason's apprentice.