user: Question: What is the total number of Total, when Silver is 1, and when Bronze is 7?
Columns: ['Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['Germany', '30', '18', '24', 72.0]
SQL:

assistant: SELECT SUM("Total") FROM "Table" WHERE "Silver" = '1' AND "Bronze" = '7';