Read the following premise and answer if the hypothesis is true.
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: Henry Pelham Fiennes Pelham-Clinton was an only child. Is the answer "Yes", "No", or "It's impossible to say"? Respond with only the answer and no additional text.
It's impossible to say
It's impossible to say. The information provided does not indicate whether Henry Pelham Fiennes Pelham-Clinton was an only child or