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: Jill and Greg got divorced after ten years of marriage. Sentence 2: When it was time to share their belongings it was a fight. Sentence 3: They didn't have a prenup and had to argue about everything. Sentence 4: They eventually found a middle ground but forgot one thing. Sentence 5: They didn't know who would keep the dog. Choices: a. Separation. b. Mistake.

a