There is a partial solution to that. So often what happens is we measure input costs, but really you can structure the lease on what I would call output performance. That is that landlords must deliver the following things, and if they don't, there are adjustments made.
To give you an example, that was the approach that was used in the famous...it's called the PRIME, the big English deal where government services sold all of their buildings to a consortium called Trillium for £250 million up front. They signed a lease, for which the net present value was about £2 billion, and it was performance based. Each time these objectives weren't reached.... Now, the problem is, in order to do that you have to keep information, you have to keep data, and you have to be on top of it.