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: Amy was in an 800 meter race. Sentence 2: She was with the pack for the first lap. Sentence 3: Then after 500 meters her head started to sway. Sentence 4: She had won the other day. Sentence 5: But this time she came in third. Choices: a. First Timer. b. Losing.

b