has already policed it. hate speech i am optimistic over a five to ten year period we'll have a.i. tools that can get into some of the linguistic nuances of different types of content to be more accurate in flagging our systems but today is just not there on that. a lot of this is reactive. people flag it to us. we have people look at it. until we get it more automated, there is a higher error rate that i am happy with. >> senator finestein. what is facebook doing to prevent foreign actor from interfering in u.s. elections? >> this is one of my top priorities is to get this right. within of my greate