CREATE TABLE table_16925 ("Governorate" TEXT, "Name in Russian" TEXT, "Name in Polish" TEXT, "Seat" TEXT, "Area ,  in thousands of km 2" FLOAT, "Population ,  in thousands ,  (  1905  ) " FLOAT)

Who, in Polish, governs a location with a population of 1640 (in thousands)?
SELECT "Name in Polish" FROM table_16925 WHERE "Population, in thousands,( 1905 )" = '1640'
SELECT "Name in Polish" FROM "table_16925" WHERE "Population, in thousands,( 1905 )" = '1640'