Relative clause

[coolpro]

"I saw the car which was made carefully in Italy"

is this sentence correct?

where does relative clause start and end?

"I saw the car which was made carefully in Italy"

or

"I saw the car which was made carefully in Italy"

?

[Raymott]

"I saw the car which was made carefully in Italy"

is this sentence correct?

where does relative clause start and end?

"I saw the car which was made carefully in Italy"

or

"I saw the car which was made carefully in Italy"

?

It depends on where you put the commas.
In 1. you put a comma after car, and after carefully. The commas delimit the clause.
In 2. you can either put a comma after car, or don't use commas. If you want to make it a defining clause, i.e. "What car? The car that was made carefully in Italy", you don't use a comma. A non-defining clause - doesn't define which car, but just adds information - you put a comma after car.