user: Question: What's the total silver medals having less than 2 gold and 2 bronze?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Soviet Union (URS)', 39.0, 38.0, 17.0, 94.0]
SQL:

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