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: My neighbor Sue has a 2 year old granddaughter, Ann. Sentence 2: Ann has low muscle tone. Sentence 3: She was very slow to progress to walking. Sentence 4: After much therapy, Ann just started walking 10 steps at a time. Sentence 5: My neighbor was excited and told us the news. Choices: a. Beach trip. b. Walking.

b