SELECT "Club Chairman" FROM table_21647 WHERE "Team captain" = 'Murat Erdoğan'
Who is the club chairman of the team that Murat Erdo an is the captain of?
CREATE TABLE table_21647 (
    "Team" text,
    "Head coach" text,
    "Team captain" text,
    "Venue" text,
    "Capacity" real,
    "Kitmaker" text,
    "Shirt sponsor" text,
    "Club Chairman" text
)