What is the number of first class team with birthday of 5 december 1970?
CREATE TABLE "new_zealand" (
  "no" text,
  "player" text,
  "date_of_birth" text,
  "batting_style" text,
  "bowling_style" text,
  "first_class_team" text
);
SELECT COUNT("first_class_team") FROM "new_zealand" WHERE "date_of_birth"='5 December 1970';