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: Bobby and Joe were tossing a ball in the back yard. Sentence 2: Bobby threw it too hard. Sentence 3: It flew across the yard smashing into the kitchen window. Sentence 4: Bobby thought he was going to be in big trouble. Sentence 5: Fortunately his parents understood that it was an accident. Choices: a. Broken Window. b. Baseball gift.

a