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: My wife's nephew lost his father when he was 9. Sentence 2: He was scared of death. Sentence 3: One day he was in the hallway of his building. Sentence 4: He saw a man who resembled his father. Sentence 5: He ran away, thinking he had seen a ghost. Choices: a. The Break Up. b. Ghost.

b