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: Esteban was learning to play the guitar. Sentence 2: He went to his girlfriend's house to serenade her. Sentence 3: He played underneath her window. Sentence 4: The window open, and an angry old woman appeared. Sentence 5: She said his girlfriend lived the next street down. Choices: a. Perfect. b. Guitar.

b