2018-03-22 UTC
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@Jason Founders: Do you think you can build a better @facebook? I'm funding seven teams for $100,000 each to do that as part of our OpenBook Challenge https://www.openbookchallenge.com/ https://pbs.twimg.com/tweet_video_thumb/DYxVV9LU8AAaJOL.jpg (twitter.com/_/status/976249105792958465)