Task: Classify the tweet into one of four ordinal classes of intensity of emotion E that best represents the mental state of the tweeter. 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: Sometimes, you have to smile, pretend everything is okay, and just walk away.
Emotion: joy
Intensity class: 
0: no joy can be inferred