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Photo by: Guillermo Arias

FILE - In this Oct. 13, 2010 file photo, Isaac "Biz" Stone, co-founder and Creative Director of Twitter Inc, speaks during a conference at the Innovate Tijuana festival in Tijuana, Mexico. In a recent interview with The Associated Press, Stone offers a glimpse into his low-key lifestyle. (AP Photo/Guillermo Arias, file)

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