CREATE TABLE "neighbourhoods_and_areas" (
  "number_on_map" real,
  "name" text,
  "colour" text,
  "construction_commenced" real,
  "population" real
);

Question: What is the average number for Northgate which commenced its construction before 1951?
SQL: SELECT AVG("number_on_map") FROM "neighbourhoods_and_areas" WHERE "name"='northgate' AND "construction_commenced"<1951;

Question: What is the lowest population for the neighborhood with the color blue that commenced its construction before 1987?
SQL: SELECT MIN("population") FROM "neighbourhoods_and_areas" WHERE "colour"='blue' AND "construction_commenced"<1987;