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: Our soldiers in war zones are held to a higher level of rules of engagement than our police officers. #sad
Emotion: sadness
Intensity class: 
3: high amount of sadness can be inferred