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: Gloriosa Bazigaga on #Rwanda work: 'I lost relatives in genocide but 15 yrs of peacebuilding has given me optimism it's within our power'
Emotion: joy
Intensity score: 
0.200