Task: Determine the appropriate intensity class for the tweet, reflecting the level of emotion E experienced by the user. 0: no E can be inferred. 1: low amount of E can be inferred. 2: moderate amount of E can be inferred. 3: high amount of E can be inferred.
Tweet: @MHChat I think sadness is felt very strongly physically and mentally.  It feels like it takes over and it's hard to focus at work #MHChat
Emotion: sadness
Intensity class: 