CREATE TABLE "heats" (
  "heat_rank" real,
  "lane" real,
  "swimmer" text,
  "country" text,
  "time" real,
  "overall_rank" real
);

Question: Tell me the highest overall rank for heat rank more than 4 and lane less than 2
SQL: SELECT MAX("overall_rank") FROM "heats" WHERE "heat_rank">4 AND "lane"<2;