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: Josh was taking care of his sister's dog while she was on vacation. Sentence 2: The dog got sick when he was watching it. Sentence 3: Josh brought the dog to the vet. Sentence 4: He called his sister to tell her the dog was sick. Sentence 5: Josh's sister was worried and came home sooner than expected. Choices: a. The Short Vacation. b. The memorial..

a