Can you tell me the Winning party of 2003 that has the Constituency of aberdeen north?
CREATE TABLE "labour_targets" (
  "rank" real,
  "constituency" text,
  "winning_party_2003" text,
  "swing_to_gain" real,
  "labour_s_place_2003" text,
  "result" text
);
SELECT "winning_party_2003" FROM "labour_targets" WHERE "constituency"='aberdeen north';