what are the names of the drivers?
jim clark, denny hulme, chris amon, jack brabham, pedro rodriguez, john surtees, chris irwin, david hobbs, alan rees, guy ligier, bob anderson, graham hill, mike spence, dan gurney, silvio moser, jochen rindt, jackie stewart, bruce mclaren, jo siffert, jo bonnier, piers courage
which drivers placed within the top 6?
jim clark, denny hulme, chris amon, jack brabham, pedro rodriguez, john surtees
which driver besides jim clark that is also british placed in the top 6?
john surtees