Task: Categorize the tweet based on the intensity of the specified emotion E, capturing the tweeter's mental state. 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: Happy Birthday to my favorite author, @StephenKing #horror #writer #author
Emotion: fear
Intensity class: 
0: no fear can be inferred