At the soccer match, the spectators were cheering enthusiastically.

Natural language understanding is an important field of artificial intelligence.

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

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 Cyrillic script is used in many Slavic languages, such as Russian and Ukrainian.

He wrote a message using ideograms.

Please write this word in lowercase.

She uses a lot of emoticons in her messages.