Two men working on the roof of a building , with one man in a cherry picker .
The men are working on the pool .
Two men working on the roof of a building, with one man in a cherry picker.
The men are working on the pool.
Either the men are working on the roof or working on the pool. Pools usually are not on the roof.
Either the men are working on the roof or working on the pool . Pools usually are not on the roof .