rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 venezuela 7 4 3 14
which nations won at least 6 medals ?
WDT NNS VBD IN JJS CD NNS .
Venezuela|Bolivia|Chile|Peru
select c2 from w where c6_number >= 6