He is a famous writer.

This email contains ghost characters.

My friend is a doctor.

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

Watching the setting sun sink into the sea, I felt at peace.

I always keep an eye on the trends in the financial market.

He is an excellent student.

Investing is difficult without knowledge of finance.

The financial crisis of 2008 had a major impact on the world economy.

My zodiac sign is Aries.