"Buffett, Howard Graham"@en . "1954Z"^^ . . "Howard Graham Buffett"@en . "Howard Graham Buffett (born December 16, 1954) is an American businessman, former politician, philanthropist, photographer, farmer, and conservationist. He is the middle son of billionaire investor Warren Buffett. He is named after Howard Buffett, his grandfather, and Benjamin Graham, Warren Buffett's favorite professor."@en . "American photographer and philanthropist" . . "1954-12-16Z"^^ . . .