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: Pro-lifers are condemning #MenForChoice - but I haven't seen any of you criticize the dismal American foster care/adoption system.
This tweet contains emotions: 
anger, disgust, pessimism, sadness