Task: Analyze the tweet's sentiment and assign it to either 'neutral or no emotion' or one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Root canal therapy has had a bad reputation in the past... but new technology has allowed more comfortable procedures!  #dental
This tweet contains emotions: 
anticipation, joy, optimism, surprise