He is a world-renowned researcher.

The operator is operating the machine.

He is already an adult, so he can make his own decisions.

The police are looking for an eyewitness to the incident.

The police arrested the suspect.

The intellectuals deeply discussed this issue.

I am the person in charge of this project.

The police said he is a ruthless murderer.

The spectators raised their voices in excitement from the stands.

It's a miracle that there were no casualties in this accident.