Tell me the least time for apostolos tsagkarakis for lane less than 6
CREATE TABLE "heats" (
  "heat_rank" real,
  "lane" real,
  "swimmer" text,
  "country" text,
  "time" real,
  "overall_rank" text
);
SELECT MIN("time") FROM "heats" WHERE "swimmer"='apostolos tsagkarakis' AND "lane"<6;