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 united states (usa) 25 16 7 48
how many countries have at least 10 total medals ?
WRB JJ NNS VBD-AUX IN JJS CD JJ NNS .
4
select count ( c2 ) from w where c6_number >= 10