Frank J. Mitsch - Wells Fargo Securities LLC
Analyst
As I look at the year-over-year trends, you were down 4% year-over-year in Q2 on volumes, down 7% on price. A little bit of an acceleration there down 5% on volumes in Q3 year-over-year and down 10% on price. So little bit worse than the Q2 year-over-year comps, yet you posted a very nice upside surprise. I guess the simple question is, as we think back to what we thought three months ago to what we actually posted today, what went right for you guys?
Mark C. Rohr - Chairman & Chief Executive Officer: Well, there's a lot of effort went into making this transition, bridging this transition. So we – to the extent we could, we – let's say that we had methanol available, some methanol available carried over a little bit in the first month. We also had accumulated some acetic acid that we've built up, all of which to help us moderate, if I can say that, Frank, the hole for methanol. And so, the pain wasn't quite as intense as we thought it would be, as we went through that quarter. So that's one thing that went well for us, I think. The startup went very well. We had – in our own mind, we had some concerns about that, as of course as you're finishing the plan. And so, that enabled us to have confidence we were going to be able to run very hard, very quickly with that unit. And that helped us in the planning, the scheduling as well. I go on to say, our models are really working well for us, Frank. I mean, the team is out there every day looking for ways to use these global models, particularly in Pat's business. And really, we're just – I don't know how to say this – we're just totally attuned to the market. So, we are – we're looking at every opportunity of making conscious decisions every day, and that allows us to extract incremental money that others can't.