Question: Which venue does Mardan sponsor?
SQL: SELECT "Venue" FROM "1-17356873-1" WHERE "Shirt sponsor" = 'Mardan';

Question: Erdoğan Arıca is the head coach at what venue?
SQL: SELECT "Venue" FROM "1-17356873-1" WHERE "Head coach" = 'Erdoğan Arıca';

Question: Who is the club chairman of the team that Murat Erdoğan is the captain of?
SQL: SELECT "Club Chairman" FROM "1-17356873-1" WHERE "Team captain" = 'Murat Erdoğan';