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: Ed was on his swim team, but had trouble breathing. Sentence 2: He could not hold his breath long enough. Sentence 3: His teacher urged him to practice. Sentence 4: Ed was dubious but followed her advice. Sentence 5: Soon, to his surprise, his breath-holding time had doubled!

Breath