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: Protesters in Brazil are burning effigies of their President. He and some of his cabinet are under investigation for corruption. #sabcnews
This tweet contains emotions: 
anger, sadness