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: Two little boys somehow got the idea they could call Santa Claus. Sentence 2: They had heard that Santa's phone number was 911. Sentence 3: The person answering the call asked to speak to a parent. Sentence 4: The boys had to learn what the number 911 is really for. Sentence 5: They also had to learn that they can't get hold of Santa by phone. Choices: a. They Couldn't Get Hold of Santa by Phone. b. The Principal's Office.

a