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 china (chn) 14 10 12 36
how many nations received a medal in each gold , silver , and bronze ?
WRB JJ NNS VBD DT NN IN DT NN , NN , CC NN .
6
select count ( c2 ) from w where c3_number > 0 and c4_number > 0 and c5_number > 0