I want to introduce the creators, Alex and Daniel, who created this video.

So what I want to do now is introduce you to a species called the Bonobo.

So let's move forward.

Oh, our treasurer. May I introduce you?

(Laughter)

And he says, maybe this isn't the best way, and wrecks the whole system.

May I introduce Mr. Tanaka to you?

(Music) Ladies and gentlemen, the Scottish Ensemble.

Let's say hello Everyday Girl's Day! Hello, we are Girl's Day

He should be friendly and cute.

Would you introduce me to your friends?

May I introduce Chad Decker?

And it's important to note that these nets weigh more than a thousand pounds when they're full of fish.

So what I'm going to show here is something that was already presented in TED by the former mayor of Curitiba who created that, a city in Brazil, Jaime Lerner.

Allow me to introduce Mr Kato to you.

May I present Mr Johnson to you?

So it's exciting potential for this.

Kind of amazing what some people did.

Now you're going to have 30 minutes to solve 15 puzzles.

Here's a project I've been working on recently which achieves this.

So here is for example, learning new things.

And it's been terribly successful.

Please give a warm welcome to a very special lady with a very special way of singing a song.

My thanks, Mr. McCabe, you are too kind.

We're going to use list comprehensions to help us write our parser.

Let's do one more of these just to show off our very arbitrary power.

I should like to introduce to you the gentleman I spoke of the other day.

I'd like to introduce to you the gentleman I told you about the other day.

In fact, I've developed some interesting tools to help me deal with this fear.

So I'll leave you there. Lists are super powerful, there's a ton of functions you can do with lists, In fact, I'll expose you to a few right here.

We're Rainbow's Woori and Hyunyoung

But with the limited time we have available,

And we're going to show you some today.

I gave you my version of the story.

Allow me to introduce you to Mr White.

Allow me to introduce you to Mr. White.

Let me introduce you to Mr. White.

Okay, we know how to measure attention in the lab.

(Laughter)

As I just introduced what Khan Academy is most known for is this library of videos that I started producing almost five, six years ago now.

The sock puppet isn't about ambiguity, per se. It's about identity.

TD

Now the people in the front row are very nervous. (Laughter)

I'd like you to meet Amy and David Sumner.

Ladies and gentlemen, I present to you