Complex sentence: She was well known as a prolific writer among her Middle Atlantic writing circle, which included Elizabeth Graeme Fergusson, Benjamin Young Prime, Samuel Stanhope Smith, Philip Freneau, and Hugh Henry Brackenridge.
Split into simpler sentences: She was well known as a prolific writer among her Middle Atlantic writing circle. The group included Elizabeth Graeme Fergusson, Benjamin Young Prime, Samuel Stanhope Smith, Philip Freneau, and Hugh Henry Brackenridge.