user: Question: Where does iceland rank with under 19 silvers?
Columns: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']
Types: ['real', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Iceland', 27.0, 19.0, 18.0, 64.0]
SQL:

assistant: SELECT "Rank" FROM "Table" WHERE "Nation" = 'iceland' AND "Silver" < 19.0;