Definition: In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.
Input: Sentence 1: Rudolf trained on this punching bags. Sentence 2: He hurt his hand on the bag. Sentence 3: He showed his trainer. Sentence 4: His trainer thought it was broken. Sentence 5: Rudolf went to the hospital.

Punching Bag