rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 soviet union 50 27 22 99
how many nations won more than ten silver medals ?
WRB JJ NNS VBD JJR IN CD NN NNS .
5
select count ( c2 ) from w where c4_number > 10