Which Pop/Area (1/km²) has a No P. larger than 1, and a Name of albergaria-a-velha?
CREATE TABLE "municipalities" (
  "name" text,
  "area_km" real,
  "pop" real,
  "pop_area_1_km" real,
  "no_p" real,
  "no_c_no_t" text,
  "subregion" text
);
SELECT AVG("pop_area_1_km") FROM "municipalities" WHERE "no_p">1 AND "name"='albergaria-a-velha';