Task: Assign one of four ordinal intensity classes of emotion E to a given tweet based on the emotional 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: What do you get when you cross an #apple tree and a #pine tree? 🍎🌲\nNothing. You can't cross-pollinate #deciduous and #coniferous #trees.
Emotion: sadness
Intensity class: 
0: no sadness can be inferred