user: Question: How many head coaches named Darius Mikaeili?
Columns: ['Team', 'Head coach', 'Team captain', 'Kit maker', 'Shirt sponsor', 'Past Season']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Esteghlal', 'Parviz Mazloomi', 'Farhad Majidi', 'Uhlsport', 'Tehran Municipality & City Bank', '3rd']
SQL:

assistant: SELECT COUNT("Head coach") FROM "Table" WHERE "Team captain" = 'Darius Mikaeili';