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 __   _    __   __    ____     __   __   _    _   
| || | ||  \ \\/ //  |  _ \\   \ \\/ // | \  / || 
| '--' ||   \ ` //   | |_| ||   \ ` //  |  \/  || 
| .--. ||    | ||    | .  //     | ||   | .  . || 
|_|| |_||    |_||    |_|\_\\     |_||   |_|\/|_|| 
`-`  `-`     `-`'    `-` --`     `-`'   `-`  `-`

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Text this: Black holes : a laboratory for testing strong gravity