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: Jake loved collecting stamps. Sentence 2: He had several books full of them. Sentence 3: His collection wasn't worth much. Sentence 4: To him, though, it was invaluable. Sentence 5: Jake kept it his entire life. Choices: a. Zap. b. Stamp Collection.

b