Who is the fastest person on earth?
Usain Bolt. He currently holds the world record in both the 100 meter and 200 meter dash, 
widely considered to be the best measurement of outright speed.
Instruction: Who is the fastest person on earth?
Context: 
Response: Usain Bolt. He currently holds the world record in both the 100 meter and 200 meter dash, 
widely considered to be the best measurement of outright speed.