Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
Tweet: @groovydadad @MHChat 🙂ty I often conflate the two depression + sadness, but they are very different. This q reminded me of that #mhchat
This tweet contains emotions: 
sadness