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: Jane and Bob went to the park yesterday. Sentence 2: They had planned a nice picnic. Sentence 3: Bob brought some wine. Sentence 4: The weather was perfect. Sentence 5: They had a nice afternoon. Choices: a. Treehouse. b. The picnic.

b