rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 algeria 8 3 0 11
how many countries scored at least 3 gold medals ?
WRB JJ NNS VBD IN JJS CD NN NNS .
3
select count ( c2 ) from w where c3_number >= 3