What is the name of the city/municipality if the population is 1,388.88?
CREATE TABLE "political" (
  "city_municipality" text,
  "no_of_barangays" real,
  "area_km" text,
  "population_2010_census" real,
  "pop_density_per_km" text
);
SELECT "city_municipality" FROM "political" WHERE "pop_density_per_km"='1,388.88';