good jack dorsey, the founder of twitter was solving a problem that was an urban problem that has spread to the world. >> they attract the risk seekers and creative entrepreneurs, so it is a magical combustion of ideas, and i would ask the ability to get these done. >> every generation has its major technology, so right now we are seeing three major trends. we were a startup 12 years ago, so we have made 21 acquisitions. 17 have had some major presence in san francisco, and they have all been about cloud computing and even the client. -- cloud. >> another factor worth noting i see them taking engineers from san francisco to the valley. that is an issue we cannot ignore. the data we are getting is staggering. some of those start-ups are the star companies. over 80% of their employees work and live in san francisco. that is not the case for a lot of other companies we know the names of, and we need to address those issues. we are working to adjust this. if you could sum up the goal, what affect you? in a couple of years, is there a way we track whether this has been successful or not in re