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 dog ran into the room. Sentence 2: He looked excited about something. Sentence 3: He started snapping at the air. Sentence 4: We thought he had lost his mind. Sentence 5: We realized he was just chasing a fly. Choices: a. Fly. b. Survey.

a