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: Betsy bought a new wagon for her kids. Sentence 2: They had a lot of fun riding in it to go to the library. Sentence 3: She would pile books around them. Sentence 4: When they got home, they'd spend all day reading. Sentence 5: Then they'd load the wagon up again and go back! Choices: a. Letter to a Friend. b. The Wagon.

b