rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 china 10 5 1 16
how many countries have at least 2 bronze medals ?
WRB JJ NNS VBD-AUX IN JJS CD NN NNS .
3
select count ( c2 ) from w where c5_number >= 2