Question: The forces of Olaf Guthfrithson were defeated by the English led by Æthelstan at a battle fought in which year ?
Sentence (from "Battle of Brunanburh"): The Battle of Brunanburh was fought in 937 between Æthelstan, King of England, and an alliance of Olaf Guthfrithson, King of Dublin; Constantine, King of Alba and Owen, King of Strathclyde.
Relevant evidence: Yes