CREATE TABLE "table1_16278602_1" (
  "danish_name" text,
  "english_name" text,
  "seat_of_administration" text,
  "largest_city" text,
  "population_january_1_2008" real,
  "area_km" real,
  "pop_density_per_km" text
);

Question: What is the population density of the Capital Region of Denmark?
SQL: SELECT "pop_density_per_km" FROM "table1_16278602_1" WHERE "english_name"='Capital Region of Denmark';

Question: In the region where Roskilde is the largest city, what is the seat of administration?
SQL: SELECT "seat_of_administration" FROM "table1_16278602_1" WHERE "largest_city"='Roskilde';

Question: What is the minimum population of the region in which Roskilde is the largest city?
SQL: SELECT MIN("population_january_1_2008") FROM "table1_16278602_1" WHERE "largest_city"='Roskilde';