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: A science team worked on research. Sentence 2: They found out about robots. Sentence 3: They decided to build one. Sentence 4: They got funding. Sentence 5: The robot spoke to people. Choices: a. Robot. b. Flights.

a