Using the tweet "@vspearson85 @tjathurman I can do it too, though it also happens involuntarily when I'm really tired or really bored, which is irritating :S", determine how much sadness is shown. The categories are: 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.