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 took the dog to the vet last week. Sentence 2: When we got there, a woman was bringing in a trailer. Sentence 3: Inside the trailer was a beautiful quarter horse. Sentence 4: We walked up and asked to pet him. Sentence 5: She smiled and let us sit on him too. Choices: a. Asking her to the ball. b. Horse.

b