Evaluation: This task is simple, and it integrates three things in one place. Interestingly, the story behind this task, you know, Diamond City was built on the ruins of the Major League Baseball Stadium in Boston. The citizens in it would definitely be interested in baseball before the war, and this old Mo claimed to be an expert in killing baseball (sweat), showing off the wrong rules of baseball in front of the old popsicle, making it look black.