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: Joseph likes pets. Sentence 2: He has two dogs and three cats. Sentence 3: One day one of the dogs got lost. Sentence 4: Joseph tried to find him very hard. Sentence 5: He finally find him. Choices: a. Winning Hit. b. Joseph's dog.

b