How many daves team entries are there on 27 october 2006?
CREATE TABLE "series_4" (
  "episode" text,
  "first_broadcast" text,
  "seans_team" text,
  "daves_team" text,
  "scores" text
);
SELECT COUNT("daves_team") FROM "series_4" WHERE "first_broadcast"='27 October 2006';