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: Africa has unique and tremendous problems with war, overpopulation, starvation and tribalism which makes moving Africa forward hard.
This tweet contains emotions: 
disgust, sadness