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: Lisa was out gardening yesterday. Sentence 2: An hour into it, Lisa heard a loud horn. Sentence 3: The horn was for the tornado warning. Sentence 4: Lisa immediately ran inside. Sentence 5: She saw the tornado sweep up much of her yard. Choices: a. Tornado watch. b. Registering to vote.

a