The key that unlocked it was the name Frank, handwritten under a gag photograph of a masked classmate in Regan's middle school yearbook.

解开它的关键点是“Frank”这个名字。这个名字就写在Regan的中学年鉴中一个模糊的同学相片下。

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Obama and the rest of his homeroom class pose for a portrait for the 1979 school yearbook.

Obama和同班同学在1979年校鉴中的合影。

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Barack Obama posing with his 1979 state basketball championship team for Punahou School. Photograph: The Oahuan, yearbook of Punahou School/AP

Barack Obama 和他的Punahou 学校1979年州篮球冠军队队友一起拍照。

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In 2005, the 15- and 16-year-old duo decided to trade the paper version of the regular high school yearbook for the digital one. myYearbook was born, a social networking website that the brother and sister team worked with throughout high school.

FORBES: myYearbook: The $100 Million Startup Name You Need To Know