user: Question: How many total silvers does russia have?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1', 'South Korea', 8.0, 1.0, 2.0, 11.0]
SQL:

assistant: SELECT SUM("Silver") FROM "Table" WHERE "Nation" = 'russia';