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: Patricia was hiking up Mt. Fuji. Sentence 2: The air got very difficult to breathe. Sentence 3: She stopped and bought a bottle of oxygen. Sentence 4: She saw all the other fit people hiking. Sentence 5: She felt guilty for needing the oxygen. Choices: a. Oxygen. b. Kyle Catches a Big One.

a