Task: Explanation
Input (English): Hafþór Júlíus "Thor" Björnsson (] ; also Hafthor Julius Bjornsson, born November 26, 1988) is an Icelandic professional strongman, actor, and former professional basketball player. He plays Ser Gregor "The Mountain" Clegane in the HBO series "Game of Thrones". Question: Hafþór Júlíus Björnsson plays an HBO character who first appears in book form in what year? Answer: 1996
Output (English):  He plays Ser Gregor The Mountain Clegane in the HBO series Game of Thrones.