He works at a non-governmental organization.

A nuclear submarine can travel underwater for a long time.

This country has fallen into anarchy.

He deeply sympathizes with the principles of anarchism.

The International Atomic Energy Agency is an international organization that promotes the peaceful use of nuclear energy.

I am planning to go to Inner Mongolia, an autonomous region of China, next week.

I have been to Outer Mongolia.

I have been to Chicago.

The Paleogene period was a very important time in the history of the Earth.

My daughter will start going to a new nursery school from next week.