>> from reid hoffman, the founder of linkedin, one of the early investors, he learned about growing a marketplace business, linkedin is very much a marketplace and airbnb is not a core marketplace business. a lot of venture capitalists, he learned everything but he went for example to george tenet who used to run the cia to talk about culture because he thought who better to talk about culture, an organization where everyone were spies, he took a lot from george tenet, told him the importance of walking around the office saying you did a good job writing notes to people and things like that. he learned a lot from john donohoe from the day and they learn from each other, had a rivers mentoring sing going on. >> he went to omaha. >> and talked to warren buffett. and he learned -- he learned it is important to remove your self from all the noise. he was struck that warren buffett sits in his office in omaha and reads all day long. he doesn't get wrapped up in things. he thinks big picture. that was an incredible meeting. he wrote a 4000 word memo to send to his executive team about this.