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: Robin went to the dentist for a checkup. Sentence 2: The dentist took x-rays of Robin's teeth. Sentence 3: She found out she had a cavity. Sentence 4: The dentist said he could take care of the cavity right away. Sentence 5: Robin was glad the dentist could fix it during that same appointment. Choices: a. Deer Hunt. b. Dentist.

b