Two men, one younger with brown hair, one older with gray hair, working on a roof together.
The two men are repairing their fathers house.
Just because there are two men working on a roof together, it does not necessarily mean that the two men are repairing their fathers house. Two men can work on a roof together without necessarily be repairing it. Not all roofs that two men work on together belong to their fathers house.
(-x)
(-x)