Question: Hafþór Júlíus Björnsson plays an HBO character who first appears in book form in what year?
Sentence (from "Hafþór Júlíus Björnsson"): Hafþór Júlíus "Thor" Björnsson (] ; also Hafthor Julius Bjornsson, born November 26, 1988) is an Icelandic professional strongman, actor, and former professional basketball player.
Relevant evidence: No