rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 south korea 7 6 1 14
how many teams did not win any gold medals in this event ?
WRB JJ NNS VBD-AUX RB VB DT NN NNS IN DT NN .
2
select count ( c2 ) from w where c3_number = 0