Complex sentence: He served terms in the state legislature until 1822 (the last year as Speaker of the House), and was elected to the Massachusetts Constitutional Convention of 1820-1821, called after Maine was separated from the state.
Split into simpler sentences: He served terms in the state legislature until 1822, the last year as Speaker of the House. He was elected to the Massachusetts Constitutional Convention of 1820-1821, called after Maine was separated from the state.