Given the emotion sadness and the tweet "I have not nap for 3 days in a row I'm very unhappy rn", rate the intensity of sadness shown. The rating scale is: 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.
3: high amount of sadness can be inferred