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: Kate had slept most of the way on the road trip. Sentence 2: She was awake now. Sentence 3: But she had no headphones to listen to music. Sentence 4: Her eyes felt heavy as she stared at the road passing by. Sentence 5: Before long she had fallen back to sleep. Choices: a. Rotten apples. b. Back To Sleep.

b