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: Heather was having her birthday party with all her classmates. Sentence 2: She was having a good time until some mean girls provoked her. Sentence 3: The girls all ended up in a large fight. Sentence 4: Heather's mom was mad so she ended the party right then. Sentence 5: Heather was so sad, but later she understood that she was wrong. Choices: a. Band. b. The Ruined Party.

b