Given the emotion sadness and the tweet "@BorisJohnson unhappy about the cost of leaving the EU ? If only you had published your letter outlining the reasons to stay instead. Idiot.", rate the intensity of sadness shown. The rating scale is: 0: no sadness can be inferred, 1: low amount of sadness can be inferred, 2: moderate amount of sadness can be inferred, 3: high amount of sadness can be inferred.