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: Tim bought a new scooter. Sentence 2: He left it on his front porch. Sentence 3: One day it was gone. Sentence 4: He filed a police report. Sentence 5: Unfortunately they didn't give him much hope about getting it back. Choices: a. Stolen Scooter. b. Lassie.

a