Complex sentence: The Religious Society of Friends, also known as The Quakers, is a movement that began in England in the 17th century.The word "Quaker" means to tremble in the way of the Lord.
Split into simpler sentences: The Religious Society of Friends is a movement that began in England in the 17th century. Members of this movement are informally known as "Quakers", a word which means to tremble in the way of the Lord.