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: One day, a mother and her 10-year old son took a walk. Sentence 2: They decided to go to their favorite park. Sentence 3: As they walked, they began to see people holding balloons. Sentence 4: The little boy asked his mother if he could get a balloon. Sentence 5: They found the person selling balloons and bought two red ones. Choices: a. The Hotel. b. Red Balloons.

b