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: Bob told all his friends about the man who lived in the sky. Sentence 2: He said the man would give them all mansions when they died. Sentence 3: Bob's friends were all very very excited to hear this. Sentence 4: They wanted the mansions immediately so they all killed themselves. Sentence 5: Bob sold off their belongings and used the money to buy a nice car. Choices: a. The fall. b. The Invention Of Lying.

b