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This is an example of a QR code; an image that contains information. To detect the hidden info, you can save the image to your computer, and upload it onto this site: http://qr4.cloudapp.net/Free-Online-QR-Code-Reader.aspx
Alternatively, if you have a smart phone, you can download one of the many QR code reader apps (simply time in 'QR code' into the app store) and read it that way.
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