Complex sentence: Muhlenberg was a member of the Continental Congress in 1779 and 1780, and served in the Pennsylvania House of Representatives from 1780 to 1783 and was elected its speaker on November 3 1780.
Split into simpler sentences: Muhlenberg was a member of the Continental Congress in 1779 and 1780, and served in the Pennsylvania House of Representatives from 1780 to 1783. He was elected its speaker on November 3 1780.