CREATE TABLE "regular_season" (
  "date" text,
  "visitor" text,
  "score" text,
  "home" text,
  "decision" text,
  "attendance" real,
  "record" text
);

Question: Who was the visiting team where the decision was Biron on October 4?
SQL: SELECT "visitor" FROM "regular_season" WHERE "decision"='biron' AND "date"='october 4';