user: Question: Stations of 16 is assigned what length?
Columns: ['Line', 'Color', 'Terminus', 'Length', 'Stations', 'Daily Ridership']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['Line 7', 'Ruby', 'Luz ↔ Jundiaí', 'kilometres (mi)', '17 + 1 (under construction)', 386.0]
SQL:

assistant: SELECT "Length" FROM "Table" WHERE "Stations" = '16';