user: Question: Name the least rank for lane less than 5 for Germany and Sandra Völker
Columns: ['Rank', 'Lane', 'Name', 'Nationality', 'Time']
Types: ['real', 'real', 'text', 'text', 'real']
Sample row: [1.0, 5.0, 'Therese Alshammar', 'Sweden', 24.8]
SQL:

assistant: SELECT MIN("Rank") FROM "Table" WHERE "Lane" < 5.0 AND "Nationality" = 'Germany' AND "Name" = 'Sandra Völker';