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 Millers had a mouse in their house. Sentence 2: Their cat had been stalking it for days. Sentence 3: He finally cornered it in the kitchen. Sentence 4: The battle went on for hours. Sentence 5: The cat finally killed the mouse. Choices: a. The Cat and Mouse. b. Caterpillar.

a