Based on the tweet "Again, this q. is brought to you by my slight feelings of irritation when I see 'obligated' over 'obliged', and I want to know if I'm right.", categorize the level of sadness felt by the author. Select from the following: 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.