Yes, we do indeed look at gravel and quartzites and different types of materials in two ways. One is when we are involved in looking at the resource potential of a particular area—let's say an input towards defining what might be conservancy areas or parks and so on. We do a full assessment that takes into account the whole gamut of what might have economic potential and that needs to be considered in those processes.
Second, as was discussed earlier, where we bring into play either a regulatory role or a federal expertise role, once again, we certainly take into account the economic potential of the full range, if you like, of the minerals and metals that are present.