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QR code in cornfield named world’s largest by Guinness

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The Kraay family in Lacombe, Canada has broken a Guiness world record for the largest "QR" computer bar-code, and it's made out of a corn field. 

The maze covers 7.4 acres. 

The CBC news in Calgary reports that the family proved it works, by flying over their farm in a helicopter and holding a phone out the window.

The Kraay's code directs people to the website for their mazes.