what is the average rank when the lane is more than 4 and the name is dominik meichtry?
CREATE TABLE "semifinal_2" (
  "rank" real,
  "lane" real,
  "name" text,
  "nationality" text,
  "time" real
);
SELECT AVG("rank") FROM "semifinal_2" WHERE "lane">4 AND "name"='dominik meichtry';