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: when season 13 of greys anatomy premieres today. it you're only on season 7 #sadness :(
This tweet contains emotions: 
sadness