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: Oscar decided that he no longer wanted to be out of shape. Sentence 2: He decided to start running outside every day. Sentence 3: At first he found it very difficult. Sentence 4: However, over time, Oscar began to enjoy running. Sentence 5: He was glad to be getting in shape. Choices: a. Breast Cancer. b. Oscar Goes For A Run.

b