rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 brazil 9 0 0 9
what is the number of silver medals awarded to argentina ?
WP VBD-AUX DT NN IN NN NNS VBN TO NNP .
7
select c4_number from w where c2 = 'argentina'