user: Question: What is the Length (m) of the Koppenberg course?
Columns: ['Number', 'Name', 'Kilometer', 'Pavement', 'Length (m)', 'Average climb (%)']
Types: ['real', 'text', 'real', 'text', 'real', 'real']
Sample row: [17.0, 'Kluisberg', 99.0, 'asphalt', 1250.0, 53.0]
SQL:

assistant: SELECT "Length (m)" FROM "Table" WHERE "Name" = 'Koppenberg';