Ann is very friendly. (She lives next door.) Ann, who lives next door, is very friendly.
We stayed at the Grand Hotel. (Ann recommended it to us.) We stayed at the Grand Hotel, which ann recommended to us.
We went to Sandra’s party. (We enjoyed it very much.) We went to Sandra’s party which we enjoyed very much.
I went to see the doctor, (He told me to rest for a few days.) who told me to rest for a few days.
John is one of my closest friends. (I have known him for a very long time.) John, who i have known for a very long time, is one of my closest friends.
Sheila is away from home a lot. (Her job involves a lot of travelling.) Sheila, whose job involves a lot of travelling, is away from home a lot.
The new stadium will be opened next month. (It can hold 90,000 people.) The new stadium, which can hold 90,000 people, will be opened next month.
We often go to visit our friends in Bristol. (It is only 30 miles away.) We often go to visit our friends in Bristol, which is only 30 miles away.
Glasgow is the largest city in Scotland. (My brother lives there.) Glasgow, where my brother lives, is the largest city in Scotland.