Assess the level of the emotion anger in the tweet provided. Use the following categories: 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.
Tweet: @DxfyingGrxvity - frustration, looking up at Elphaba in a frown of aggravation. Her high pitched voice was growing more and more --
2: moderate amount of anger can be inferred