That's the dog. Its owner is French.
--> That's the dog... (two possibilities)

The man was very rich. I saw him last night.
--> The man ... was very rich. (four possibilities)

That's the building. I work there.
That's the building... (one possibility)

I lent my jacket to Pam. The jacket is made of leather.
The jacket ... is made of leather. (three possibilities)

That's my dentist. I met him in La Orotava.
--> That's my dentist, ... (two possibilities)

A song won the competition. It was written by a schoolboy.
--> The song ... was written by a schoolboy. (two possibilities)

Jane's house is going to be pulled down. She is looking for a new flat.
Jane, ..., is looking for a new flat. (one possibility)

I left school on a day. It was hot and sunny.
--> The day ... was hot and sunny. (two possibilities)

I'm afraid of water. That's why I never swim in the sea.
--> I'm afraid of water, ... swim in the sea. (two possibilities)

The best time to go shopping is in the morning. The shops are not very busy then.
--> The best time to go shopping is in the morning, ... are not very busy. (one possibility)