rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 canada 9 6 5 20
which countries won the more than five silver medals ?
WDT NNS VBD DT JJR IN CD NN NNS .
Canada|United States|Austria|Italy
select c2 from w where c4_number > 5