What is the start of the Team of Andretti Green Racing with a finish higher than 3 in a year before 2007?
CREATE TABLE "indianapolis_500" (
  "year" real,
  "chassis" text,
  "engine" text,
  "start" real,
  "finish" real,
  "team" text
);
SELECT AVG("start") FROM "indianapolis_500" WHERE "team"='andretti green racing' AND "finish">3 AND "year"<2007;