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: What do you get when you cross an #apple tree and a #pine tree? 🍎🌲\nNothing. You can't cross-pollinate #deciduous and #coniferous #trees.
This tweet contains emotions: 
anticipation, optimism