Task: Classify the tweet's emotional intensity into one of four ordinal levels of emotion E, providing insights into the mental state of the user. 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: Historically Japanese have always been into #jazz and #blues. The 70s dark age of jazz big names like C.C. &amp; M.D. were surviving on Tokyo.
Emotion: sadness
Intensity class: 
0: no sadness can be inferred