What is the value for Position, when the Series is the Macau Grand Prix, and when the Season is before 2007?
CREATE TABLE "career_summary" (
  "season" real,
  "series" text,
  "wins" text,
  "podiums" text,
  "position" text
);
SELECT "position" FROM "career_summary" WHERE "series"='macau grand prix' AND "season"<2007;