Task: Determine the appropriate intensity category of emotion E for the tweet, reflecting the emotional state of 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: Since the 'update' my @iPhone loses power nearly 40% faster.  #furious
Emotion: anger
Intensity class: 