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 owned a mammoth breed dog once, his name was Remy. Sentence 2: He lived with me for 10 years and traveled everywhere, even overseas. Sentence 3: Having a dog that weighs as much as a man is very expensive. Sentence 4: He used to eat an entire giant size bag of dog food every week. Sentence 5: He died a few years ago, but I'll never forget him and our adventures. Choices: a. My Dog. b. Volleyball Tournament.

a