Given the emotion sadness and the tweet "I click on download on my PC. Message says 'Thank you for downloading #iTunes \nSo, where's the download?! #frustrated", 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.