user: Question: What is the highest value for col(m) at North Island?
Columns: ['Rank', 'Peak', 'Country', 'Island', 'Elevation (m)', 'Prominence (m)', 'Col (m)']
Types: ['real', 'text', 'text', 'text', 'real', 'real', 'real']
Sample row: [1.0, 'Aoraki/Mount Cook', 'New Zealand', 'South Island', 3755.0, 3755.0, 0.0]
SQL:

assistant: SELECT MAX("Col (m)") FROM "Table" WHERE "Island" = 'North Island';