Task: Classify the tweet into one of four ordinal classes of intensity of emotion E that best represents 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: It's always depressing to sort WordPress plugin recommendations not by 'best' but by 'least offensive in terms of premium features.'
Emotion: sadness
Intensity class: 
2: moderate amount of sadness can be inferred