I have been to Santo Domingo.

He is an expert in sociolinguistics.

I am very interested in sociolinguistics.

Trinidad and Tobago is a country located in the Caribbean Sea.

He always boasts, but in reality, he does nothing.

He has a habit of always boasting.

The era of the Three Sovereigns and Five Emperors is an important period in Chinese history.

My friend came from Congo-Brazzaville.

I have been to Congo-Kinshasa.

Burgundy wine is famous worldwide.