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: Allie had a debate for history class. Sentence 2: She had prepared for many hours for it. Sentence 3: But all of the sudden her mind went blank. Sentence 4: She couldn't focus. Sentence 5: She didn't know what to say. Choices: a. Blank mind. b. A Natural.

a