Task: Estimate the strength of emotion E in the tweet by assigning it a real-valued score between 0 and 1, where 0 signifies the least intensity and 1 signifies the greatest intensity.
Tweet: @BorisJohnson unhappy about the cost of leaving the EU ? If only you had published your letter outlining the reasons to stay instead. Idiot.
Emotion: sadness
Intensity score: 
0.605