rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 venezuela 5 2 3 10
how many countries scored no gold medals at this event ?
WRB JJ NNS VBD DT NN NNS IN DT NN .
4
select count ( c2 ) from w where c3_number = 0