user: Question: Where was something built earlier than 1858?
Columns: ['Name', 'Type', 'Year Built', 'Where Built', 'Initial Owners']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['Mountain Buck', 'side', 1857.0, 'Portland', 'Ruckle & Olmstead']
SQL:

assistant: SELECT "Where Built" FROM "Table" WHERE "Year Built" < 1858.0;