What is the surface area and GNP of the country where Namibe district belongs?
SELECT T2.SurfaceArea, T2.GNP FROM City AS T1 INNER JOIN Country AS T2 ON T1.CountryCode = T2.Code WHERE T1.District = 'Namibe'
database name:db_id world
City table City Cols: ID dtype integer, Name dtype text, Country Code dtype text, District dtype text, Population dtype integer, 
Country table Country Cols: Code dtype text, Name dtype text, Continent dtype text, Region dtype text, Surface Area dtype real, Independence Year dtype integer, Population dtype integer, Life Expectancy dtype real, Gross National Product dtype real, Gross National Product Old dtype real, Local Name dtype text, Government Form dtype text, Head Of State dtype text, Capital dtype integer, Code2 dtype text, 
CountryLanguage table CountryLanguage Cols: Country Code dtype text, Language dtype text, Is Official dtype text, Percentage dtype real, 
