He is an expert in computational linguistics and is involved in the development of artificial intelligence.

The United Nations Environment Programme is providing solutions to global environmental problems.

Each class conducts lessons in their respective classrooms.

The center of that table is sunken.

He boxed his younger brother's ears for his mischief.

In physics, the study of the 'nucleus' at the center of an atom is important.

This book is my favorite.

The farmer was harvesting rice in the paddy field.

My house is in this quarter of the city.

This room is divided by a wall.