Question: What did the Anglo-Saxons fail to prevent during the battle which inspired the J.R.R. Tolkien work The Homecoming of Beorhtnoth Beorhthelm's Son?
Sentence (from "Corey Olsen"): Corey Olsen is a professor and podcaster known as the Tolkien Professor best known for his work in new media promoting the works of J.R.R. Tolkien and Anglo Saxon literature.
Relevant evidence: No