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  ______     ___      ____      ______   _    _   
 /_____//   / _ \\   |  _ \\   /_   _// | \  / || 
 `____ `   / //\ \\  | |_| ||   -| ||-  |  \/  || 
 /___//   |  ___  || | .  //    _| ||_  | .  . || 
 `__ `    |_||  |_|| |_|\_\\   /_____// |_|\/|_|| 
 /_//     `-`   `-`  `-` --`   `-----`  `-`  `-`  
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Text this: Impact of primary user activity statistics in cognitive vehicular networks