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: Michael had won lots of medals. Sentence 2: He wanted to win more. Sentence 3: He went to the Olympics. Sentence 4: He swam the best he could. Sentence 5: He won another one. Choices: a. Gold Medal. b. New shoes.

a