That's right. It's a very complex problem.
We might know where the person is, but we don't know what they're doing there. We needed to know the level of drift that we might find and how we would deal with that in policy. Do you revoke somebody's conditional release because it looks like they were in the wrong place, when in fact you find out, by looking before and after that time, where they actually were? That was the real purpose of the pilot.