user: Question: How long was the 16 staged event in 1997?
Columns: ['Year', 'Name', 'Date', 'Stages', 'Distance', 'Winner', 'Time']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1982', 'Marlboro Tour', '22 April–9 May', '15', '2,192 km', 'Jacinto Sicam ( PHI )', '61:29:17']
SQL:

assistant: SELECT "Distance" FROM "Table" WHERE "Stages" = '16' AND "Year" = '1997';