Question: where was the virtually unprotected area where german armies avoided the maginot line
[{'answer': 'the Ardennes forest', 'provenance': [{'wikipedia_id': '20351', 'title': 'Maginot Line', 'start_paragraph_id': 4, 'start_character': 39, 'end_paragraph_id': 4, 'end_character': 58, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '20351', 'title': 'Maginot Line', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 766, 'bleu_score': 0.539377072861952, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3436632788412799665}, 'section': 'Section::::Abstract.'}]}]