user: Question: What is the sum of rank when silver is 1, and gold is less than 7, and bronze is 2?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'United States', 26.0, 21.0, 24.0, 71.0]
SQL:

assistant: SELECT SUM("Rank") FROM "Table" WHERE "Silver" = 1.0 AND "Gold" < 7.0 AND "Bronze" = 2.0;