What is the time of the transmission on 28 December 2008 with a running time of 66 min 21 sec?
CREATE TABLE "transmissions" (
  "date" text,
  "time" text,
  "channel" text,
  "running_time" text,
  "notes" text
);
SELECT "time" FROM "transmissions" WHERE "running_time"='66 min 21 sec' AND "date"='28 december 2008';