Determine how strongly sadness is expressed in the following tweet. Use the scale: 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.
Tweet: What do you get when you cross an #apple tree and a #pine tree? 🍎🌲\nNothing. You can't cross-pollinate #deciduous and #coniferous #trees.
0: no sadness can be inferred