Task: Assign a suitable level of intensity of emotion E to the tweet, representing the emotional 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: @united horrible service. EWR. Not a cloud in the sky. Normal departure at 10am now leaving at 5pm. Crappy #UnitedAirlines
Emotion: fear
Intensity class: 
0: no fear can be inferred