Input (grade 12): Boulogne-Billancourt is a sub-prefecture of the Hauts-de-Seine department and the seat of the Arrondissement of Boulogne-Billancourt.
Output (grade 10): Boulogne-Billancourt is a sub-prefecture of the Hauts-de-Seine dÃ partement ans is in the Ã le-de-France region.