Definition: In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.
Input: Sentence 1: Bill was riding his bike down the street. Sentence 2: He rolled to a stop sign, but didn't stop. Sentence 3: A car was passing through the intersection. Sentence 4: Bill's bike hit the tail end of the car. Sentence 5: Bill had to be hospitalized for a week. Choices: a. The Bike Ride. b. Dog House.

a