I don't have any specific details of it. I know that there are constant efforts. There's a great philosophy of “test and learn” within Facebook, so what we see are the adaptations from day to day. Understanding how news is produced and the changes within that market as well is a constant progression.
I don't know that there's anything in particular that we would have pointed to in that time period, as distinct from the day-to-day improvements that we always try to make relative to the algorithm, relative to—