Complex sentence: George Nugent-Temple-Grenville, 1st Marquess of Buckingham, KG, PC (17 June 1753--11 February 1813) was a British statesman; he was the second son of George Grenville and a brother of the 1st Baron Grenville.
Split into simpler sentences: George Nugent-Temple-Grenville, 1st Marquess of Buckingham, KG, PC (17 June 1753--11 February 1813) was a British statesman. He was the second son of George Grenville and a brother of the 1st Baron Grenville.