Complex sentence: See also He was elected to the Massachusetts State Senate in 1932, narrowly defeating six Irish-American candidates, and ending years of Irish political domination in his district, which included East Boston, Charlestown, and the North, West, and South Ends.
Split into simpler sentences: See also He was elected to the Massachusetts State Senate in 1932, narrowly defeating six Irish-American candidates. His election ended years of Irish political domination in his district, which included East Boston, Charlestown, and the North, West, and South Ends.