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 was a very smart man. Sentence 2: He was totally nonviolent. Sentence 3: His friend convinced him that it's not violence when it's self defense. Sentence 4: He learned that self defense is simply intelligence. Sentence 5: Tom became an adept martial artist. Choices: a. Lipstick Allergy. b. Combat.

b