user: Question: What country is the Jiufotang Formation located in?
Columns: ['Name', 'Status', 'Authors', 'Unit', 'Location']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Cathayopterus', 'Valid', 'Wang Zhou', 'Yixian Formation', 'China']
SQL:

assistant: SELECT "Location" FROM "Table" WHERE "Unit" = 'Jiufotang Formation';