rank nation gold silver bronze total
rank
nation
gold
silver
bronze
total
number
number
number
number
number
number text number number number number
1 japan 5 2 0 7
what is the difference in silver medals between china and chinese taipei ?
WP VBD-AUX DT NN IN NN NNS IN NNP CC NNP NNP .
3
select ( select c4_number from w where c2 = 'china' ) - ( select c4_number from w where c2 = 'chinese taipei' )