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: Our soldiers in war zones are held to a higher level of rules of engagement than our police officers. #sad
This tweet contains emotions: 
disgust, pessimism, sadness