Analyze the tweet "@Cigna bows out for the moment. Rather than sulk, I'm going to @UCSF for an opinion from the guys studying #Oligodendroglioma. ✌️&amp; ❤️ &amp; 🍩's" and quantify the intensity of the emotion sadness. Use a scale from 0 to 1, with 1 representing the highest intensity.
0.312