user: Question: What is the total number of Silver medals for the Nation with less than 1 Bronze?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Japan', 6.0, 4.0, 1.0, 11.0]
SQL:

assistant: SELECT SUM("Silver") FROM "Table" WHERE "Bronze" < 1.0;