user: Question: Gold of 0, and a Bronze smaller than 0 and what is the sum of the silver?
Columns: ['Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['Philippines', 1.0, 0.0, 1.0, 2.0]
SQL:

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