Based on the tweet "Catching up on Greys, almost couldn't make it through two episodes because of how sad the storyline was. Two best/worst eps for me.", 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.