user: Question: What is the minimum length of the locations where the average climb percentage is exactly 59%?
Columns: ['Number', 'Name', 'Kilometer', 'Pavement', 'Length (in m)', 'Average climb (%)']
Types: ['real', 'text', 'real', 'text', 'real', 'real']
Sample row: [10.0, 'Berg Ter Stene', 213.0, 'asphalt', 1300.0, 5.0]
SQL:

assistant: SELECT MIN("Length (in m)") FROM "Table" WHERE "Average climb (%)" = 59.0;