Jun 23, 2014 by

epa04216763 Guatemalan Luis von Ahn, Co-founder abd CEO of Duolingo, and inventor of CAPTCHA and reCAPTCHA, speaks about ‘The Beginning of New TIME: Key 2, Capture’ during the opening ceremony of the Seoul Digital Forum in Seoul, South Korea, 21 May 2014. The Seoul Digital Forum under the theme ’29 Keys to Innovative Wisdom’ is held from 21 until 22 May. EPA/JEON HEON-KYUN

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