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: Sam needed to do community service for his class. Sentence 2: He asked around the library for assistance. Sentence 3: They gave him a job to meet the service requirement. Sentence 4: Sam did his job for two weeks. Sentence 5: They gave him a letter showing he did the service. Choices: a. Randy has a heart attack. b. community service.

b