rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 new caledonia 120 107 61 288
how many nations have at least 20 gold medals ?
WRB JJ NNS VBD-AUX IN JJS CD NN NNS .
5
select count ( c2 ) from w where c3_number >= 20