Complex sentence: He later attended Harvard University, where he was a research assistant on John Hart Ely's book "Democracy and Distrust", graduating in 1975 and then spending one year at the London School of Economics and Political Science in the United Kingdom.
Split into simpler sentences: He later attended Harvard University, where he was a research assistant on John Hart Ely's book "Democracy and Distrust", graduating in 1975. He spent one year of this studying at the London School of Economics and Political Science in the United Kingdom.