Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
Tweet: Sister: (Canadian player does something shady.) Jonathan Toews is frowning and he doesn't know why. #WorldCupOfHockey
This tweet contains emotions: 
anger, disgust, sadness