Task: Calculate the intensity of emotion E in the tweet as a decimal value ranging from 0 to 1, with 0 representing the lowest intensity and 1 representing the highest intensity.
Tweet: @kelly_welles they were brilliant weren't they? Made me feel v dull not having one. And why no tattoo emoji! This'll have to do... ⚓️ x
Emotion: sadness
Intensity score: 
0.312