Given the emotion sadness and the tweet "@thehill George H. Establishment is unhappy Trump's campaign branded his son low-energy, but he could not have beaten the others either.", classify the intensity of the emotion displayed in the tweet. The classification options 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.
1: low amount of sadness can be inferred