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 children would not go to sleep. Sentence 2: I sang them a lullaby. Sentence 3: They still would not go to sleep. Sentence 4: I turned on the television. Sentence 5: They finally fell asleep after an hour. Choices: a. Sleepy children. b. Dinner.

a