Which location has a time of 9:30pm?
CREATE TABLE "table1_21330550_2" (
  "date" text,
  "time" text,
  "acc_team" text,
  "big_ten_team" text,
  "location" text,
  "television" text,
  "attendance" real,
  "winner" text,
  "challenge_leader" text
);
SELECT "location" FROM "table1_21330550_2" WHERE "time"='9:30PM';