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: Grace was married for 40 years when her husband died. Sentence 2: They used to boat on a quiet river. Sentence 3: Grace's husband would do the rowing and she would nap. Sentence 4: She got in the boat on the river which was so calm she fell asleep. Sentence 5: When she awoke, she remembered her husband was dead and she was lost! Choices: a. Research. b. Lazy river..

b