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: Nelly hadn't seen her elderly neighbor all week. Sentence 2: Usually she would be out in her garden working. Sentence 3: When so much time had passed Nelly called the police. Sentence 4: Then she learned that her neighbor had had a heart attack. Sentence 5: Luckily the woman would be okay in a few weeks. Choices: a. Princess. b. The Missing Neighbor.

b