user: Question: What is the lowest number of sunlight hours, and number of days with frost, more than 30, for the city of ourense?
Columns: ['City/Town', 'July av. T', 'Rain', 'Days with rain (year/summer)', 'Days with frost', 'Sunlight hours']
Types: ['text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Santiago de Compostela', '°C ()', 'mm (in)', '141 / 19', 15.0, 1998.0]
SQL:

assistant: SELECT MIN("Sunlight hours") FROM "Table" WHERE "City/Town" = 'ourense' AND "Days with frost" > 30.0;