I somewhat referred to that earlier. Some of those buildings are what we would refer to as “value-adds”, where there is still work to be done to create value. They may be development lands, and the highest invest use may not be the existing office building that's sitting on them.
They may be surplus buildings to the government's needs and further review and work is required to determine whether they can be reutilized as office buildings, renovated for some other use, or demolished and developed as something else.
So to the point that there is still considerable study to determine what other opportunities exist, those assets typically would have greater values down the road in some other way and therefore would not be conducive to a sale and leaseback, which would effectively leave money on the table if sold in this fashion.