Text this: Optimal algorithms for selecting top-k combinations of attributes : theory and applications

            _____     _____     ______   _    _   
    ___    |  ___||  |__  //   /_   _// | || | || 
   /   ||  | ||__      / //     -| ||-  | || | || 
  | [] ||  | ||__     / //__    _| ||_  | \\_/ || 
   \__ ||  |_____||  /_____||  /_____//  \____//  
    -|_||  `-----`   `-----`   `-----`    `---`   
     `-`