What was the pic for Canada for player Yvon Bouillon earlier than 1974?
CREATE TABLE "wha" (
  "year" real,
  "round" real,
  "pick" real,
  "player" text,
  "nationality" text
);
SELECT AVG("pick") FROM "wha" WHERE "nationality"='canada' AND "year"<1974 AND "player"='yvon bouillon';