Task: Categorize the tweet into an intensity level of the specified emotion E, representing the mental state of the tweeter. 0: no E can be inferred. 1: low amount of E can be inferred. 2: moderate amount of E can be inferred. 3: high amount of E can be inferred.
Tweet: Do not grow weary of doing good' a lasting legacy @billclinton @ClintonGlobal #CGI2016 #thankfulmoment @ProjectThankful
Emotion: sadness
Intensity class: 
0: no sadness can be inferred