user: Question: Who is the head coach for the team, Arminia Bielefeld?
Columns: ['Team', 'Head coach', 'Team captain', 'Kitmaker', 'Shirt sponsor']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Alemannia Aachen', 'Michael Krüger', 'Benjamin Auer', 'Nike', 'Aachen Münchener']
SQL:

assistant: SELECT "Head coach" FROM "Table" WHERE "Team" = 'Arminia Bielefeld';