Complex sentence: She subsequently married Benjamin Starr, who was born in Yarmouth, Massachusetts, the grandson of Dr. Comfort Starr of Boston, a founder of Cambridge, Massachusetts and a founder of Harvard College and a surgeon who emigrated from Ashford, Kent, England.
Split into simpler sentences: She subsequently married Benjamin Starr, who was born in Yarmouth, Massachusetts, the grandson of Dr. Comfort Starr of Boston. He was a founder of Cambridge, Massachusetts as well as and a founder of Harvard College and a surgeon who emigrated from Ashford, Kent, England.