Who was the winner when the SEC team LSU played?
CREATE TABLE "table1_20540006_6" (
  "date" text,
  "time" text,
  "big_east_team" text,
  "sec_team" text,
  "location" text,
  "television" text,
  "attendance" real,
  "winner" text,
  "challenge_leader" text
);
SELECT "winner" FROM "table1_20540006_6" WHERE "sec_team"='LSU';