She played the white keys of the piano briskly.

He is posting private tweets by creating a private account.

Please make sure to lock the door before you leave the house.

The key to success is in your own hands.

His success had a cause-and-effect relationship with his efforts.

He and I are related by blood.

There is a complex love triangle between them.

This is the book that I am reading.

His claim does not match the actual relationship.

The police only informed the authorized persons about the information related to the incident.