Complex sentence: Alexander Bache was born in Philadelphia on July 19,1806, the son of Richard Bache, Jr., and Sophia Burrell Dallas, the nephew of George M. Dallas, and the great-grandson of Benjamin Franklin.
Split into simpler sentences: Alexander Bache was born in Philadelphia, the son of Richard Bache, Jr., and Sophia Burrell Dallas Bache. He was the nephew of George M. Dallas, and was the great-grandson of Benjamin Franklin.