Question: An icelandic professional strongman plays a character nicknamed "The Mountain" in what series of novels?
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: Yes