Premise: Henry Pelham Fiennes Pelham-Clinton, 4th Duke of Newcastle-under-Lyne {'1': ", '2': ", '3': ", '4': "} (31 January 1785 – 12 January 1851) was a British nobleman and politician who played a leading part in British politics in the late 1820s and early 1830s. He was styled Lord Clinton from birth until 1794 and Earl of Lincoln between 1794 and 1795.
Hypothesis: He was the 4th Duke of Newcastle-under-Lyne and played a leading part in British politics.