You're asking the coalition, and I'm sorry, at least in terms of the experience we have with some of the demonstrations that have happened to date, no, nothing underground.
I would concur, though, on the point of geothermal. That's about as close as we've seen where any interest is about going underground and in any capacity. But I would also make the point that the way we approach this is technology neutral, so where geothermal or solar might have its validity or viability in one part of the country, it may not be as viable in another part of the country. Geothermal and other technology options will vary, but if we take a neutral approach to this and look at it as whatever works in a particular region, then that's best.
But I'm afraid I can't answer you on the principle of digging deep into the ground. Sorry.