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

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

That incident was truly something very unfortunate and scary.

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

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.

This piano is made of high-quality ebony.

This factory mainly uses bituminous coal.