Complex sentence: He was born in Georgetown, now a part of Washington, D.C., the son of Elisha Riggs and Alice Lawrason and the great-grandson of John Riggs who was mentioned in a will in Anne Arundel County, Maryland, as early as 1716.
Split into simpler sentences: He was born in Georgetown, D.C. (now part of Washington), the son of Elisha Riggs and Alice Lawrason. His great-grandfather was John Riggs, who was mentioned in a will in Anne Arundel County, Maryland, as early as 1716.