So what we did with Yauliyacu, is it’s a Glencore owned asset in Peru. It has got well over 150 years of operating history, and so it has got a very-very extensive history. And we signed the original transaction there, back in 2006, and it had a 20 year term to it. So we came back and sat down with Glencore, and so we'd like to convert this to a life of mine agreement. This is an asset, a district that has shown the ability to continue to replace reserves and resources going forward. It’s a series of dominant structures that continue on to depth. It has got very good infrastructure, it's one of the key things is that water issues aren't a problem, they have got an excellent system set up there for managing ground waters, and so it does give very-very long term potential. And so, our interest was in converting it to a life-of-mine type agreement. We wanted to make this asset around, part of Silver Wheaton for a very long time. Their interest was to try and bring up their production payment on a per ounce basis, and help that move forward. So we came up with an agreement with Yauliyacu, that sort of -- it has a number of different triggers on it. I am not going to go into the detail here, but we'd be happy to provide it shortly. But it's basically a sharing thing that sort of incents them to continue moving the project forward, investing into the project, and we get the benefit of not only incentives during the next remaining 10 years of this contract or nine years of this contract, but we also now get the, call it, life of the mine contract, and it runs well beyond the original nine year term. So like all of our transactions, this is, in our eyes, a win-win. We gain because it's now converted to life of mine. We do think this is an asset that's going to be producing for a very long time. And for that, we pay a little bit to be able to do that type of a transaction and not put capital upfront, but to make it as part of the operating costs, is something that's very attractive to us. We have got better places to put our capital right now, in terms of doing that. If we can supply growth like that, without having to put capital upfront right now, that's also very attractive to us. So the costs have gone up, but that's how we are paying for the -- what I would call, the incredible extra potential we have got out of this mine now.