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: Sam asked if he could live with his aunt. Sentence 2: He was at her house all the time. Sentence 3: She took him to the zoo. Sentence 4: She bought him a stuffed giraffe. Sentence 5: She let him touch the stingrays. Choices: a. Sam. b. The Mistake.

a