defining
Children who hate chocolate are uncommon.
They live in a house whose roof is full of holes.
An elephant is an animal that lives in hot countries
.Let's go to a country where the sun always shines.
The reason why I came here today is not important.
non defining
He gave me the letter, which was in a blue envelope.
My house, which has a blue door, needs painting.
The smartphone, which he bought yesterday, is 5 months old
Dublin, which is the capital of Ireland, is my favourite city.
Do you know the girl, who is talking to Tom?
