A day has 24 hours.

A proper noun is a noun that refers to a specific person, place, or thing.

This eigenfunction is one of the fundamental concepts of quantum mechanics.

He ate one apple.

It is important for each person to fulfill their role.

He acted according to my instructions one by one.

His variety of pitches is very diverse, which troubles the batters.

This seedless grape is very sweet.

Tanemaru is my best friend.

He obtained a third-class driver's license.