Given the emotion joy and the tweet "Optimism leads to success. - Bill Kerr @Coach__Kerr #success #optimism #goals", classify the intensity of the emotion displayed in the tweet. The classification options are: 0: no joy can be inferred, 1: low amount of joy can be inferred, 2: moderate amount of joy can be inferred, 3: high amount of joy can be inferred.
1: low amount of joy can be inferred