user: Question: How many silvers for the nation with under 6 total and under 0 bronze?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1', 'China (CHN)', 1.0, 1.0, 0.0, 2.0]
SQL:

assistant: SELECT SUM("Silver") FROM "Table" WHERE "Total" < 6.0 AND "Bronze" < 0.0;