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: Ken collected leaves and flowers on nature walks. Sentence 2: When he got home, he pressed them between the pages of his diary. Sentence 3: One day he picked a pretty, shiny dark green leaf. Sentence 4: What he didn't know was that the leaf was poison ivy! Sentence 5: Poor Ken had to get treatment at his local Urgent Care center! Choices: a. Leaves. b. First Born.

a