Given the emotion anger and the tweet "I've learned to let go of resentment for people who have hurt me, because keeping it is like swallowing poison and expecting them to die.", classify the intensity of the emotion displayed in the tweet. The classification options are: 0: no anger can be inferred, 1: low amount of anger can be inferred, 2: moderate amount of anger can be inferred, 3: high amount of anger can be inferred.
1: low amount of anger can be inferred