There is ketchup on my mouth.

As a result of his efforts, he was able to gain fame.

He works at an Internet cafe every night.

At my house, the internet access is very fast.

The Internet of Things is an important technology in modern society.

He is using that coat from winter to spring.

You need to use your head to solve this problem.

Do you understand the necessity of this project?

That information is unnecessary.

That information is completely unnecessary.