What is the least amount of severe tropical cyclones for the 1992–93 season and the tropical Lows smaller than 6?
CREATE TABLE "1990s" (
  "season" text,
  "tropical_lows" real,
  "tropical_cyclones" real,
  "severe_tropical_cyclones" real,
  "strongest_storm" text
);
SELECT MIN("severe_tropical_cyclones") FROM "1990s" WHERE "season"='1992–93' AND "tropical_lows"<6;