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: Joe was very rich but very bored. Sentence 2: One day, he received a postcard from Rome intended for his neighbor. Sentence 3: He looked at the beautiful landscape and got an idea. Sentence 4: The next day, he booked a plane and packed a bag. Sentence 5: He then left his home and went on a vacation in Italy. Choices: a. When A Family Visit Isn't. b. Sudden decision.

b