What was team Toshiba's round 4 score?
CREATE TABLE "overall_team_standings" (
  "rank" real,
  "team" text,
  "round1" real,
  "round2" real,
  "round3" real,
  "round4" real,
  "round5" real,
  "total_points" real
);
SELECT MIN("round4") FROM "overall_team_standings" WHERE "team"='Team Toshiba';