How man teams have a writer named harry angus?
CREATE TABLE "notes" (
  "club_name" text,
  "name_of_team_song" text,
  "basis_for_team_song" text,
  "first_used_as_team_song" text,
  "writer_composer" text
);
SELECT COUNT("name_of_team_song") FROM "notes" WHERE "writer_composer"='Harry Angus';