I’ll give you some sense to how we backed into those numbers, and again, and probably more from a 30,000 foot view than the actual specific numbers. So let me talk more about data and methodology. But there are some 400 penetrations in the Marcellus in Pennsylvania before we started drilling, old well bores that had been drilled out or horizons, or old shale pits where you had log data and information and studies from those. And on top of that, we’re currently at about 85 wells ourselves. So we’ve got a lot of log data and the core data and production data and test data. So we arrived at it two different ways. We started with looking at the data from our logs and cores to try to determine how much gas is in place, and that considers things like porosity, reservoir pressure, shale thickness, total organic carbon, reservoir temperature, amongst other things. So, taking all that data together and then volumetrically looking at it, we said how much gas is in place and then we applied to that a reasonable range of recovery factors in order to get the recoverable gas, and then of course netted it back to our interest, and that gave us a range of values. And then independently, we looked at based on the data that we have from our wells, and our oldest horizontal well now has been online about 190 days, and now we have several other wells that aren’t too far behind. And we looked at, using decline curve analysis, what might the ultimate recovery be per well, and given the gas in place numbers that we know for various spacing assumptions, we looked at what kind of recovery could you get from a certain spacing. And then given various spacing assumptions, the amount of acreage we had, the amount of acreage we could drill, we backed into what reserves could be from that point of view also, and from that we calculated a range of reserves from low to high. Really if you go through that exercise, you can calculate numbers that are a lot higher than what we put out but we thought we’re very early in the play and given its enormous expanse and that we’re early, we put out what we thought was a conservative, reasonable range of reserves, and that’s the 10 to 15 Tcf number. Obviously a lot of upside for us, and we’re excited by what our team’s been able to accomplish so far.