Mustard gas is a type of chemical weapon and is very dangerous.

The use of chemical weapons is prohibited by international law.

This is a kind of flower.

I need mustard for my hot dog.

This road is dangerous, so please be careful.

Please avoid this road because it's dangerous.

I was amazed at his extraordinary talent.

Please press this button in case of emergency.

He got the latest weapon.

It is a very beautiful view.