Natural language understanding is an important field of artificial intelligence.

He looked around in all directions, but there was no one in sight.

I decided to take the morning off tomorrow.

Kashiwa was reading a book under the big oak tree.

Of course, you must not tell his secret to others.

He was in a hurry and collided with someone around the corner.

That's a new thing, isn't it?

He created a new story.

He was in a hurry and collided with the wall with a 'bang' as he turned the corner.

He hits the ball hard.