The Quaternary is the most recent era in Earth's history.

His first adjective is 'beautiful'.

He is learning how to use the second adjective.

In our company, we always adhere to the principle of safety first.

This contract prohibits interference by a third party.

She was going through puberty and was confused by the changes in her body.

He was the first discoverer of that new species of plant.

He damaged his peroneus tertius muscle due to a foot injury.

He is recognized as the top person in that field.

World War I was a large-scale war that lasted from 1914 to 1918.