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: The family tied their luggage to the roof. Sentence 2: One of the roped came loose. Sentence 3: A bag flew off of the car. Sentence 4: It landed in front of another car. Sentence 5: It caused a big accident. Choices: a. Black Friday. b. Luggage.

b