user: Question: What was the statue in St. Paul, Minnesota constructed before 1966 made out of?
Columns: ['Statue', 'Location', 'Height m', 'Height ft', 'Completed', 'Material']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Statue of Liberty (Liberty Enlightening the World)', 'Liberty Island , New York', '46 m', '151ft', 1886.0, 'cast copper on metal armature']
SQL:

assistant: SELECT "Material" FROM "Table" WHERE "Completed" < 1966.0 AND "Location" = 'St. Paul, Minnesota';