What is the average GBP Price with an event in Monterey, a RM auction house, and a price of $154,000 later than 2003?
CREATE TABLE "auction_history" (
  "auction_house" text,
  "year" real,
  "event" text,
  "price" real,
  "gbp_price" real
);
SELECT AVG("gbp_price") FROM "auction_history" WHERE "event"='monterey' AND "auction_house"='rm' AND "price"='154,000' AND "year">2003;