What is the highest rank when the lane is larger than 6, and the heat is 3, and the nationality is colombia?
CREATE TABLE "heats" (
  "rank" real,
  "heat" real,
  "lane" real,
  "name" text,
  "nationality" text,
  "time" text
);
SELECT MAX("rank") FROM "heats" WHERE "lane">6 AND "heat"=3 AND "nationality"='colombia';