A common noun.
A proper noun would be a word that always has to be capitalized , like names of places , people and such , therefore that would make it a common.
1. My father, who is an intellectual, works in the computer industry.
2. I have to stay calm because my car, which was very expensive is on fire.
3. France, where I was born, has a large fashion industry.
4. The gym, where I go swimming, is just across town.
5. The house, which is very big, is also very cold!
6. The weather forecaster, who is quite reliable, said it’s supposed to rain today.
