I kept talking with him for over an hour.

The police started chasing the criminal.

This piece of art is made of serpentine.

Oil is an important element of the world economy.

This historic site is an important place for deeply understanding Japanese history.

I saw a wagtail in the park.

The police are chasing the criminal.

This stone-made building demonstrates ancient technology.

The garden where the iris flowers are blooming is very beautiful.

There are still vacant seats on the train.