<human>:  When the raven says ‘Nevermore’, what does it mean?
<bot>: The raven says “Nevermore” because he’s dead. The poem is about a man who is haunted by the spirit of his dead friend, who was murdered by the man’s rival. The raven is the only one who knows the truth, and he tells the man that he will never rest until he finds out what happened to his friend.