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: A rock star broke his guitar on stage. Sentence 2: A show was coming up tomorrow! Sentence 3: He had to get a new guitar quick. Sentence 4: They stopped at a guitar store. Sentence 5: He bought a new one. Choices: a. Susan's Pet. b. New Guitar.

b