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: Gary went into the mountains. Sentence 2: He brought his bike. Sentence 3: He rode it down the mountain. Sentence 4: He hit a branch. Sentence 5: His bike broke down.

Mountain Bike