user: Question: What is the sum of Silver with a Bronze that is larger than 0 with a Gold smaller than 0?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Japan', 5.0, 4.0, 2.0, 11.0]
SQL:

assistant: SELECT SUM("Silver") FROM "Table" WHERE "Bronze" > 0.0 AND "Gold" < 0.0;