user: Question: Which Year(s) of manufacture has a Quantity larger than 39, and a Type of 1′C1′ h2t?
Columns: ['Class', 'Railway number(s)', 'Quantity', 'Year(s) of manufacture', 'Type']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['B(Krauss) ( de )', '172–177', 6.0, '1867–1868', 'B n2t']
SQL:

assistant: SELECT "Year(s) of manufacture" FROM "Table" WHERE "Quantity" > 39.0 AND "Type" = '1′C1′ h2t';