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: The migraine started with a blank space in my vision. Sentence 2: It began to spread and turned to sparkling aura. Sentence 3: After thirty minutes the pain hit. Sentence 4: I began to vomit and become very ill. Sentence 5: I had to lie down in the dark. Choices: a. Piggy bank. b. Migraine.

b