The geological surveys provide basic data, which is an indication of what mineral resources might exist in the provinces and in the various states, but it's a long way from actually knowing it's there. So the exploration company then says, okay, we think there may be something there. In that case, the statistics generally say that for every one hundred projects you take on—in other words, you think something's there and you're going to explore it—in one in a hundred cases you're right. But then of those cases, only one in five is economical.
It's a continual process of hypotheses building based on data. We use the government data to hypothesize that there is a mine there. We collect our own information in much more detail and find out most of the time that we're wrong.