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: Gary was invited to his niece's preschool graduation. Sentence 2: At first, Gary was shocked at the concept of preschool graduation. Sentence 3: However, Gary quickly got over the shock because of his niece. Sentence 4: Gary decided he would bring her some balloons, and a teddy bear. Sentence 5: Gary could not wait to see his niece on her preschool graduation. Choices: a. Steve and Nancy Get Married. b. Preschool Graduation.

b