user: Question: What is the shortest length of a track in Norway that has a maximum grade of 15% and a vertical drop less than 122.22 m?
Columns: ['Country', 'Track', 'Length (m)', 'Vertical Drop (m)', 'Maximum Grade (%)', 'Bobsleigh-skeleton curves']
Types: ['text', 'text', 'real', 'real', 'text', 'text']
Sample row: ['Austria', 'Igls', 1220.0, 98.1, '14', '14']
SQL:

assistant: SELECT MIN("Length (m)") FROM "Table" WHERE "Maximum Grade (%)" = '15' AND "Vertical Drop (m)" < 122.22 AND "Country" = 'Norway';