Task: Measure the level of emotion E in the tweet using a real-valued score between 0 and 1, where 0 represents the lowest intensity and 1 represents the highest intensity.
Tweet: Thank you @Pret 4 giving me a free coffee for bringing my reusable cup to the airport because it was 1st time you saw one. But #depressing
Emotion: sadness
Intensity score: 
0.625