user: Question: What is the location of the Durfee Mill No. 1, built before 1872 ?
Columns: ['Ref#', 'Name', 'Built', 'Location', 'Construction']
Types: ['real', 'text', 'real', 'text', 'text']
Sample row: [1.0, 'Algonquin Printing Company', 1891.0, 'Middle Street', 'red brick']
SQL:

assistant: SELECT "Location" FROM "Table" WHERE "Built" < 1872.0 AND "Name" = 'Durfee Mill No. 1';