Task: Assess the emotional content of the tweet and classify 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 best represent the tweeter's mental state.
Tweet: What a sad evening - clearing out all of Harvey's cage and belongings. Now so final. Goodbye my little man.... #depressing
This tweet contains emotions: 
sadness