Question: The forces of Olaf Guthfrithson were defeated by the English led by Æthelstan at a battle fought in which year ?
Sentence (from "Olaf Guthfrithson"): Olaf succeeded his father as King of Dublin in 934 and succeeded in establishing dominance over the Vikings of Limerick when he captured their king, Amlaíb Cenncairech, in 937.
Relevant evidence: No