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: Ethan's dad was a sports card collector. Sentence 2: He would show Ethan all the players and all the sports they played. Sentence 3: He would explain who the cards will be worth money someday. Sentence 4: Ethan got very interested in starting his own collection. Sentence 5: Ethan's dad gave him a few cards to get his collection started. Choices: a. Learning Tennis. b. Card Collecting.

b