user: Question: If unknown is larger than 1.0, what is the maximum two year amount?
Columns: ['Year', 'Total', 'Less than a year', 'One year', 'Two years', 'Three years', 'Four years', '5–9 years', '10–14 years', '15–19 years', '20–24 years', '25 and more', 'Unknown']
Types: ['real', 'text', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: [2004.0, '1 293', 54.0, 149.0, 181.0, 129.0, 97.0, 249.0, 221.0, 118.0, 48.0, 45.0, 2.0]
SQL:

assistant: SELECT MAX("Two years") FROM "Table" WHERE "Unknown" > 1.0;