pos no driver team laps time/retired grid points
pos
no
driver
team
laps
time\\/retired
grid
points
number
number
number
number hour min sec
number
number
number number text text number time number number
1 14 robert doornbos minardi team usa 107 1:45:07.617 15 31
what was the number of drivers that did not finish the race ?
WP VBD-AUX DT NN IN NNS WDT VBD-AUX RB VB DT NN .
4
select count ( c3 ) from w where c6_number is null