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: From harboring Osama bin Laden to its relationship with Haqqani network, there is enough evidence to prove Pakistan is sponsoring terrorism
Emotion: fear
Intensity class: 