Now do this put-the-text-back-together activity.
This is the text (if you need help).
An 18-time world champion, Lee Se-Dol, retired because humans cannot beat computers at Go. Mr Lee is the only person to beat Google's AlphaGo. This is a computer program that plays Go. Mr Lee said: "Even if I become the number one, there is [something] that cannot be defeated."
Go started in China 3,000 years ago. Today, 46 million people play it in 75 countries. Mr Lee started playing at the age of five. He turned professional when he was 12. He won just one game against AlphaGo. He said it was because of a "bug" in the computer program. Today's Go programs are more powerful than AplhaGo.
Back to the Go lesson.