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: @AlisonMoyet Knock, knock!\nWho's there?\nA guard\nA guard who?\n...do, do, push pineapple, shake a tree...\n\nI'll shut up now.
Emotion: fear
Intensity score: 
0.417