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: @X_KIMTAEHYUNG_X \n— momentarily before it disappeared, only solemnity and anxiety lacing his features. \n\n'I ran out to get you before —
Emotion: sadness
Intensity score: 
0.646