user: Question: What is the total number of Gold, when Silver is 2, and when Total is less than 7?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'South Korea', 5.0, 4.0, 4.0, 13.0]
SQL:

assistant: SELECT SUM("Gold") FROM "Table" WHERE "Silver" = 2.0 AND "Total" < 7.0;