to get their willingness to undertake initiatives require they are held acould wantable for making mistakes or not being instantaneous in their response or where users are posting lots of content. it is by making sure we have provided the kind of legal frame work that motivates companies. >>. >> the bill that our colleague came to testify on is to replace social content online. and while in your view it being counter productive, can you explain how that would work? >> yeah. it is could wanter intuitive. it assumes that existing services continue to do what they are already doing. if we change liability structure they might decide the best thing is to do the moderation work. while we might be able to take care of some players by driving them out we might also create other players that choose do little or none of the work we expect them to do. if they turn off their policing effort they create more environme environment. >> do you know any where it's to help combat online sex trafficking, similar crimes and if so how effective these efforts have been? >> i don't have the details on that. >> d