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: I had to go the the airport once and took a shuttle service. Sentence 2: It ended up being just me and the driver all the way to Atlanta. Sentence 3: He started talking to me about marriage and unity. Sentence 4: It was so funny to me because he kept saying unitity and not unity. Sentence 5: In the end, I left on a plane with a bit more knowledge about unitity. Choices: a. Unite-ity. b. John Failed His Plumbing Exam.

a