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 girl called her friend. Sentence 2: It went to voicemail. Sentence 3: The girl left a silly message. Sentence 4: The friend heard the message. Sentence 5: The friend laughed at the funny joke. Choices: a. Sing Along. b. Funny Joke.

b