[['year', 'entrant', 'chassis', 'engine', 'points'], ['1950', 'brown motors', 'kurtis kraft 2000', 'offenhauser l4', '0'], ['1951', 'brown motors', 'schroeder', 'offenhauser l4', '0'], ['1952', 'vulcan tool', 'r miller', 'r miller', '0'], ['1953', 'ma walker electric', 'kurtis kraft', 'offenhauser l4', '0'], ['1954', 'commercial motor freight', 'ewing', 'offenhauser l4', '0'], ['1956', "shannon 's", 'kurtis kraft 500a', 'offenhauser l4', '0']]
Duke Dinsmore competed in 6 formula 1 world championship
[ENT] competed in 6 formula 1 world championship