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: Tom loved learning. Sentence 2: He decided to take on a great challenge. Sentence 3: He read the complete encyclopedia in one year. Sentence 4: He impressed himself with his feat. Sentence 5: He became smarter during the process. Choices: a. The Farm. b. Encyclopedia.

b