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: Mary wants to be a singer. Sentence 2: She is taking singing classes. Sentence 3: Her teacher told him she doesn't sing very well. Sentence 4: Mary got very angry with her teacher. Sentence 5: Mary found a new teacher. Choices: a. Mary is angry. b. New watch.

a