Instructions: 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: Liz noticed a bird's nest by her bedroom window. Sentence 2: She didn't think much of it until that night. Sentence 3: She awoke to loud hooting. Sentence 4: It was an owl's nest! Sentence 5: Since they are nocturnal she knew she wasn't going to get much sleep. Choices: a. Up All Night. b. Concert Tickets.
Output:
a