It's a good question, Mark, and obviously we are at a point here where we are looking at next two years and saying, "Yes, we did get ahead of the curve with respect to our production efficiency initiatives and our cost initiatives." And so, there is a point in time where they will flatten out, you can't anymore than 100% reliability out of an asset, like Mike is trying really hard. So we have been looking at that. Well, I think we are at a fortunate point when you look at with the guidance we have given is we said we had about a billion dollars of capacity within our current balance sheet to be outgoing [ph] this year; opportunistic M&A, and that was asset-based M&A. And I think SNA is a pretty good call on that. If you look at any of the numbers on that, SNA looks like a very attractive acquisition at the right point in the market for us, and it's long-term. So it's got enough in it that any uncertainties we have in it should be able to be managed through the economics cycle. It's a lot different. It's a smaller asset acquisition as you aware, you sail a little bit closer to the wind, and I would probably put our [indiscernible] acquisition with Apache into that bucket, where it was a small asset and unfortunately the reservoir did deliver like it needed to for us to make that asset work. So I think you can expect us to see more of SNE type opportunities coming in, obviously our preference is for oil, long date, I have already made some long dated guess, it's difficult to see, for us how that creates long-term value at this point in the cycle, although there maybe some opportunistic things. With respect to the North West Shelf, Canning, Exmouth Basin, our view is those -- the owners of those assets will be reviewing them over the next couple of years, as to what they do, we have a footprint in three of those four assets being North West Shelf, Pluto and now Wheatstone. We feel we are very well to take advantage of any asset movement that may occur in there and we will also benefactor of any tooling that will take place. So we are quite positive about where we think the backfill the North West Shelf will come from it's too early for us to give guidance on it, but we are starting to see line of sight now, in our view the assets that can come through North West Shelf and we will provide more guidance on that as we go through the year.