user: Question: What is the sum of all silver medals with less than 23 medals in total and more than 3 bronze medals for the united states?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1', 'Scotland', 9.0, 2.0, 2.0, 13.0]
SQL:

assistant: SELECT SUM("Silver") FROM "Table" WHERE "Total" < 23.0 AND "Nation" = 'united states' AND "Bronze" > 3.0;