I think certainly we've said that we intend to undertake an investigation with regard to Cambridge Analytica and the situation there. We need to understand what happened and where that information went. If it's still out there, we need to make sure that it's taken care of.
With regard to other situations, I think you're right: it's possible that there are other situations out there. The one that I think you may be referring to is a situation of scraping, where even public information that's available on Facebook and on the Internet was collected by a party. If that was done, that was in violation of our policies, and I think that's another area where we have taken steps but need to take more steps.
I think it's certainly a possibility that there are other incidents out there. It's incumbent upon us to do the work to understand those and mitigate them.