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: After spending £450 @Debenhams I was offered a £5 voucher. I asked if I could spend it at weekend? Was told 'no valid today only' #unhappy
Emotion: sadness
Intensity score: 
0.814