-- You should move your car out of the way.
-- This is not my car but someone else's car.
I want to get rid of the redundancy in the sentence which is presented by the second "car". So how can it be rephrased with being grammatically correct?
I thought of:
This is not my car but someone else's.
But there must be a possessive noun as the apostrophe + 's' don't stand alone.
This is not my car but someone's else.
I know this can't indicate the same meaning since "else" would act as the possessive noun, but would it be valid in this case?
And another one:
This is not my car but someone else's one.
Substituting "car" with "one" seems suitable; however, the sentence wouldn't sound very natural and/or totally non-redundant.