Evaluate the tweet for the intensity of the emotion sadness. The categories are as follows: 0: no sadness can be inferred, 1: low amount of sadness can be inferred, 2: moderate amount of sadness can be inferred, 3: high amount of sadness can be inferred.
Tweet: @charles_gaba @NateSilver538 @DavMicRot @FiveThirtyEight A litany of name-calling. How dull.
0: no sadness can be inferred