The politician was very popular. Everyone voted for him.
The politician who/that everyone voted for was very popular.
The book is a bestseller. It was published last month.
The book which/that was published last month is a bestseller.
The man is a famous actor. I spoke to him yesterday.
The man who I spoke to yesterday is a famous actor.
The new car is fast. He bought it last week.
The new car which/that he bought last week is fast.
That's the house. I grew up in that house.
That's the house which/that I grew up in.
The movie was fantastic. We watched it last night.
The movie which/that we watched last night was fantastic.
The man lives next door. He is my neighbor
The man who/that lives next door is my neighbor
My sister is a doctor. She lives in New York.
My sister, who lives in New York, is a doctor.
She introduced me to a friend. She had traveled all over the world.
She introduced me to a friend who/that had traveled all over the world.
This is the document. We were talking about it.
This is the document that/which we were talking about.