Instructions: 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: Lucas looked into his mother's eyes. Sentence 2: He asked if she remembered him. Sentence 3: She said yes he was Lim, his brother. Sentence 4: Lucas sighed and left the nursing home. Sentence 5: He thought about the effects of Alzheimer's. Choices: a. Alzheimers. b. An Extra Assignment.
Output:
a