round round circuit date pole position fastest lap winning driver winning team winning privateer
round
round
circuit
date
pole position
fastest lap
winning driver
winning team
winning privateer
number
number parsed year month day
number text text date text text text text text
1 r1 mantorp park 10 may mattias ekstrom fredrik ekblom mats linden kristoffersson motorsport richard goransson
what is the total number of dates listed ?
WP VBD-AUX DT JJ NN IN NNS VBN .
6
select count ( distinct c4 ) from w