Based on the tweet "@thekillers #killerspresale - How is it fair that people have bought multiple tickets and are re-selling them at twice the price? #angry", categorize the level of anger felt by the author. Select from the following: 0: no anger can be inferred, 1: low amount of anger can be inferred, 2: moderate amount of anger can be inferred, 3: high amount of anger can be inferred.