What is the average Year, when Position is 9th, when Event is 100 m, and when Venue is Munich, Germany?
CREATE TABLE "achievements" (
  "year" real,
  "competition" text,
  "venue" text,
  "position" text,
  "event" text
);
SELECT AVG("year") FROM "achievements" WHERE "position"='9th' AND "event"='100 m' AND "venue"='munich, germany';