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) 5 0 0 5
which nation won the most silver medals ?
WDT NN VBD DT RBS JJ NNS .
Soviet Union (URS)
select c2 from w order by c4_number desc limit 1