user: Question: Who is the team captain of Regenboogstadion?
Columns: ['Club', 'Location', 'Current manager', 'Team captain', 'Stadium', 'Capacity']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['Standard Liège', 'Liège', 'László Bölöni', 'Steven Defour', 'Stade Maurice Dufrasne', 30000.0]
SQL:

assistant: SELECT "Team captain" FROM "Table" WHERE "Stadium" = 'Regenboogstadion';