David S. Rosenthal
Management
Yes, sure, let me hit those 2 questions. In terms of the first question, I don't have any specific guidance, but as we have said for a long time, I will continue to say we are always looking for opportunities that are out there and you've seen that in some of the acquisitions that we've made over the last year or so. We continue to look at opportunities. Certainly, as the environment changes over time, we're always checking to see what's available and what might be of value to us. But again, no specifics. In terms of the individual IP rates, I don't have any specifics to give you. I will say that if you look, for example, up in the Cardium, where some of the tight oil well rates that you've heard from others, ours are certainly doing well and at the upper end of that range. We're getting good rates in the Woodford Ardmore. We're looking forward to some of the other ones. But again, a lot of our drilling has been delineation in nature, and we have yet to bring a lot of those wells on production. So I wouldn't want to give specifics other than to just conclude and say, that program is going well, and we're very optimistic, and again, in particular, the Bakken, the Cardium and the Woodford Ardmore are all looking very attractive, and I look forward to giving you more update on those areas as this year progresses.
Robert A. Kessler - Tudor, Pickering, Holt & Co. Securities, Inc., Research Division: Okay. If I could ask one quick clarification on the Downstream, you mentioned the benefit of inventory liquidation. It sounds like you blew through a couple of LIFO liquidation layers. Any quantification that benefit to earnings more explicitly and then any kind of strategy around liquidation of inventories around year end, ad valorem tax purposes for example, or is this just kind of an inherent volatility in the inventory balances?