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AMSTERDAM, NETHERLANDS - MAY 24: CEO of Uber, Travis Kalanick, attends the kick-off of Startup Fest Europe on May 24, 2016 in Amsterdam, The Netherlands. The event facilitates match-making between investors and startup entrepreneurs from all over the world. (Photo by Michel Porro/Getty Images)

AMSTERDAM, NETHERLANDS - MAY 24: CEO of Uber, Travis Kalanick, attends the kick-off of Startup Fest Europe on May 24, 2016 in Amsterdam, The Netherlands. The event facilitates match-making between investors and startup entrepreneurs from all over the world. (Photo by Michel Porro/Getty Images)