<i>Questions from the floor: We have lobbied Facebook to let us export data from your system. That really gets to the essence of a closed platform. Who owns the data? "It's the user's data. We want to get there, that's the goal. If you look at where we've gone in four years, from just one college letting people share a very limited amount of information... we want to get there. It's a flaw in the system now and we want to get it out as soon as we can. I don't know how long it's going to take."</i>