Please put the book on the shelf above.

In addition, he can play the piano.

He categorized the books by genre.

In this library, books are classified by genre.

He is an expert in ornithology, studying types of birds all over the world.

He is an expert in speleology and is exploring caves around the world.

He is majoring in meteorology at university.

He is passionate about his research in futurology.

He is majoring in analysis at university.

Let's eat lunch in the school cafeteria.