Given the emotion sadness and the tweet "More #checking at #work today\n\n#coffee #drank and now it's #down to some #serious #business \n\n#Thursday bring on #Friday", classify the intensity of the emotion displayed in the tweet. The classification options 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.
0: no sadness can be inferred