Determine how strongly sadness is expressed in the following tweet. Use the scale: 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