Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: . @UNFCCC @uncclearn The problem is the time it has taken to do this means its going to be out of date already. #sadly
This tweet contains emotions: 
fear, pessimism, sadness