He sent an advance notice of tomorrow's party by email.

He gave notice that he would be absent from the meeting tomorrow.

Goguryeo was a kingdom that existed from 37 BCE to 668 CE.

That incident was truly something very unfortunate and scary.

My friend came from the Republic of Korea.

The core part of this machine requires very complex engineering.

His taste in music is really hardcore.

The character of the nation of Japan is a constitutional monarchy.

The theory of black body radiation is an important part of physics.

The Islamic State is an extremist organization spread across the Middle East.