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: Toby has a lot of friends in school and is very popular. Sentence 2: Toby got invited to a birthday party with most of his friends. Sentence 3: At the party, Toby ate something bad and his stomach hurt a lot. Sentence 4: He tried to find the restroom but there was a line that was too long. Sentence 5: Toby ran home in a hurry to use the restroom. Choices: a. Bad stomach ache. b. Kiwi.

a