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: The dog next door loved our dog. Sentence 2: They met at the fence every day. Sentence 3: They whined when they couldn't reach each other. Sentence 4: One day he seemed to turn on her. Sentence 5: His owners came over and apologized. Choices: a. Fight. b. Dog Next Door.

b