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: @VivYau is it all doom and gloom? I only want to hear lovely things about airbnb!
Emotion: sadness
Intensity class: 
1: low amount of sadness can be inferred