Using the tweet "That new Kask aero helmet is grim. Especially in yellow. Looks like a safety hard hat ... #TDF #healthandsafety", determine how much sadness is shown. The categories are: 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.