Tell me the average heat rank with a lane of 2 and time less than 27.66
CREATE TABLE "heats" (
  "heat_rank" real,
  "lane" real,
  "swimmer" text,
  "country" text,
  "time" real,
  "overall_rank" real
);
SELECT AVG("heat_rank") FROM "heats" WHERE "lane"=2 AND "time"<27.66;