rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
first second
number
number
number
number
number text(text) number number number number
1 japan (jpn) 9 0 1 10
how many countries earned no bronze medals ?
WRB JJ NNS VBD DT NN NNS .
2
select count ( c2 ) from w where c5_number = 0