Using the tweet "@RichardAArnold I miss you! 🙁 As soon as Piers Morgan has gone, I'll be back. Hope all is well with you 🙂", 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.