Provide the district of the city with a population of 201843.
SELECT District FROM City WHERE population = 201843
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, 
