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: Damien was playing outside one day while his parents were arguing. Sentence 2: When they stopped their quarreling they realized Damien was gone. Sentence 3: They looked and looked but couldn't find Damien. Sentence 4: Days had gone by and still no sign of their precious child. Sentence 5: The parents never found their boy and learned a hard lesson. Choices: a. Karen's lost blender. b. The Lost Boy.

b