year driver nation of citizenship racing series type of vehicle
year
driver
nation of citizenship
racing series
type of vehicle
number
number text text text text
1993 nigel mansell united kingdom formula one open wheel
which racing series has the highest total of winners ?
WDT VBG NN VBD-AUX DT JJS NN IN NNS .
NASCAR
select c4 from w group by c4 order by count ( * ) desc limit 1