Instructions: 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: Audrey loved to learn about planets. Sentence 2: At night, she looked into the sky. Sentence 3: At school, she studied as much science as she could. Sentence 4: Audrey grew up. Sentence 5: She works at NASA now! Choices: a. Erstwhile Vegetarian. b. Stargazer.
Output:
b