The book that / which was on the table has disappeared.
The book (that / which) I bought yesterday has disappeared.
Barcelona, which is on the Mediterranean coast, is the capital of Cataluña.
The man who is talking to John is a doctor.
The man (who / that) John is talking to is a doctor.
My brother Bill, who / whom John is talking to, is a doctor.
My brother Bill, to whom John is talking, is a doctor.
The boy whose leg was broken in the accident has been sent home from hospital.
Ronbee, whose poetry is read by many, is a great man!
And now, sing along with me ....
In the town where I was born lived a man who sailed the seas.