user: ### NOW ANSWER:
Question: What is the total number of medals won by nations that had 7 bronze medals and more than 18 gold medals?
Columns: ['Rank', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['1', 18.0, 12.0, 7.0, 37.0]
SQL:

assistant: SELECT SUM("Total") FROM "Table" WHERE "Bronze" = 7.0 AND "Gold" > 18.0;