How many head coaches named Darius Mikaeili?
CREATE TABLE "personnel_and_sponsoring" (
  "team" text,
  "head_coach" text,
  "team_captain" text,
  "kit_maker" text,
  "shirt_sponsor" text,
  "past_season" text
);
SELECT COUNT("head_coach") FROM "personnel_and_sponsoring" WHERE "team_captain"='Darius Mikaeili';