Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: A cheerful sloth annotated old books about a very good man then the gods ended evil.
This tweet contains emotions: 
joy, optimism