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In this Aug. 13, 2016 photo, Autumn James, a doctoral candidate in the Northern Illinois University Department of Geography, gives a presentation on how GPS data is used to create augmented reality games such as "Pok'mon Go." in DeKalb, Ill. (Keith Hernandez/Daily Chronicle via AP)

In this Aug. 13, 2016 photo, Autumn James, a doctoral candidate in the Northern Illinois University Department of Geography, gives a presentation on how GPS data is used to create augmented reality games such as "Pok'mon Go." in DeKalb, Ill. (Keith Hernandez/Daily Chronicle via AP)

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