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: I wonder what American city will be next to protest about police shootings. Who's next? Smh. #whenwillitstop  #howmanymoretimes
This tweet contains emotions: 
anger, disgust, fear, sadness