Complex sentence: Margaret Fell or Margaret Fox (1614-23 April 1702) one of the founding members of the Religious Society of Friends, known popularly as the "mother of Quakerism" is considered one of the Valiant Sixty, early Quaker preachers and missionaries.
Split into simpler sentences: Margaret Fell or Margaret Fox (1614-23 April 1702) was one of the founding members of the Religious Society of Friends, and was popularly known as the "mother of Quakerism". She is considered one of the Valiant Sixty, early Quaker preachers and missionaries.