Task: Text Categorization
Input (English): One antagonist in this work leaves behind the head of Aeschere after killing him. Unferth argues that the success of this work's title character was due to luck. A villager steals a golden cup from a cave towards the end of this work. The title character  beheads the corpse of a figure who had been attacking Herot and decides to help King Hrothgar at its beginning. At the end of this work, Wiglaf helps the protagonist battle a dragon which ultimately kills the hero. For 10 points, name this epic poem about a hero who killed the monster Grendel.
Output (English): Literature