What sponsor has the head coach Samad Marfavi?
CREATE TABLE "personnel_and_sponsoring" (
  "team" text,
  "head_coach" text,
  "team_captain" text,
  "kit_maker" text,
  "shirt_sponsor" text,
  "past_season" text
);
SELECT "shirt_sponsor" FROM "personnel_and_sponsoring" WHERE "head_coach"='Samad Marfavi';