Complex sentence: Seaver was first elected to represent Boston's Ward 5 as a member of the Common Council in 1845, he was reelected to the Common Council from Ward 5 in 1846 and 1847.
Split into simpler sentences: Seaver was first elected to represent Boston's Ward 5 as a member of the Common Council in 1845. He was reelected to the Common Council from Ward 5 in 1846 and 1847.