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: There was a strange odor coming from my bedroom. Sentence 2: I couldn't figure out where it came from. Sentence 3: At first I thought something died in the air vents. Sentence 4: I checked the vents and found nothing. Sentence 5: I finally realized it was an overflowing trash can that smelled. Choices: a. The hot house. b. The smell..

b