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: Sue was on her daily run. Sentence 2: She noticed the sky was a bit dark but didn't think much about it. Sentence 3: She kept running and got further away from her house. Sentence 4: Suddenly it started to rain. Sentence 5: By the time Sue got home, she was soaked. Choices: a. Rainy Run. b. Background star.

a