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: The family traveled to Ireland. Sentence 2: They saw an amazing, historic castle. Sentence 3: They roamed the halls and looked at every nook and cranny. Sentence 4: What a beautiful piece of history! Sentence 5: They felt very fortunate that they'd been able to take this trip. Choices: a. The Pets. b. The Castle.

b