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: Eric bought a road bike to commute to work. Sentence 2: But his local roads were really bad. Sentence 3: And sometimes he had to ride on the sidewalk. Sentence 4: His bike could not tolerate the harsh commute. Sentence 5: So he returned it for a more durable mountain bike.

Mountain Bike