Task: Determine the dominant emotion in the tweet and classify it as either 'neutral or no emotion' or one of the eleven provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Why does having anxiety drain some much of your energy #anxiety #sotired #needtosleepforhours
This tweet contains emotions: 
fear, pessimism, sadness