user: Question: Which Silver is the highest one that has a Rank of 19, and a Gold larger than 0?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['1', 'Hungary', 5.0, 2.0, 0.0, 7.0]
SQL:

assistant: SELECT MAX("Silver") FROM "Table" WHERE "Rank" = '19' AND "Gold" > 0.0;