My house is big.

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.

The concept of chemical equivalent is essential for understanding chemical reactions.

It is said that this Sekitou is for worshipping ancient gods.

He thoroughly researched the history of that nation.

He is a famous composer.

He is a famous lyricist who has produced many hit songs.