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: The large ship was out at sea. Sentence 2: Suddenly, it hit a coral reef. Sentence 3: The ship started sinking! Sentence 4: It sank to the bottom of the ocean. Sentence 5: Explorers found it many years later. Choices: a. The Shipwreck. b. The Umbrella.

a