user: Question: What was the date of Natural cause situation?
Columns: ['Date', 'Location', 'Nature of incident', 'Circumstances', 'Casualties']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['2008-03-27', 'Kunduz area', 'Hostile', 'IED', '3 WIA']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Circumstances" = 'Natural cause';