Complex sentence: Hutt entered Parliament as MP for Kingston upon Hull in 1832, holding the seat until 1837, when he was defeated by William Wilberforce, but regained it in 1838 when Wilberforce was unseated on petition.
Split into simpler sentences: Hutt entered Parliament as MP for Kingston upon Hull in 1832, holding the seat until 1837, when William Wilberforce defeated him. He regained it in 1838 when Wilberforce was unseated on petition.