and by the way, that would be wpp, omni-kon, publy sibt ipg, disney time warner, 21st century fox, cbs, viacom, come kracast, charter and dish. that would still only total 90% of what google and facebook are together worth. does the commission have concerns about that massive accumulation of power that big tech has, and in particular, how should antitrust law approach that massive concentration of power? >> thank you, senator. so in the antitrust context, we're worried about exercise of market power, right? and so that's where woe want to look for the anti-competitive conduct. that's where you want to look for your case generation and for your investigations. so of course when you've got a situation, let me say this also, which is that the fact that they're big doesn't mean it's a problem in the antitrust laws, big is not necessarily bad. but if you've got big by being bad, if you got big through anti-competitive conduct, or you're staying big because of anti-competitive conduct, that's something that we need to prohibit. and we need to stop. >> other commissioners have thoughts on tha