What is Local Location, when Resident Country is "Belgium", and when Mission is "Poland"?
CREATE TABLE "non_resident_heads_of_missions" (
  "mission" text,
  "resident_country" text,
  "local_location" text,
  "local_mission" text,
  "non_resident_head_of_mission" text,
  "local_position" text
);
SELECT "local_location" FROM "non_resident_heads_of_missions" WHERE "resident_country"='belgium' AND "mission"='poland';