rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 puerto rico 17 27 13 57
name all the nations that won at least five silver medals .
VB PDT DT NNS WDT VBD IN JJS CD NN NNS .
Puerto Rico|Bahamas|México|Jamaica
select c2 from w where c4_number >= 5