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: Alexander had to see the dentist. Sentence 2: He was very nervous about the visit. Sentence 3: He had to get x-rays to see inside his teeth. Sentence 4: The dentist used a special toothbrush to tickle his teeth. Sentence 5: Lucky for Alex he didn't have any cavities! Choices: a. Stuck in the Elevator. b. Trip to the dentist.

b