Question: what are the 3 layers of the meninges
[{'answer': 'dura mater', 'provenance': [{'wikipedia_id': '398932', 'title': 'Meninges', 'start_paragraph_id': 1, 'start_character': 173, 'end_paragraph_id': 1, 'end_character': 183, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'arachnoid mater', 'provenance': [{'wikipedia_id': '398932', 'title': 'Meninges', 'start_paragraph_id': 1, 'start_character': 189, 'end_paragraph_id': 1, 'end_character': 204, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'pia mater', 'provenance': [{'wikipedia_id': '398932', 'title': 'Meninges', 'start_paragraph_id': 1, 'start_character': 214, 'end_paragraph_id': 1, 'end_character': 223, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the arachnoid mater', 'provenance': [{'wikipedia_id': '398932', 'title': 'Meninges', 'start_paragraph_id': 1, 'start_character': 185, 'end_paragraph_id': 1, 'end_character': 204, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the pia mater', 'provenance': [{'wikipedia_id': '398932', 'title': 'Meninges', 'start_paragraph_id': 1, 'start_character': 210, 'end_paragraph_id': 1, 'end_character': 223, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '398932', 'title': 'Meninges', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 406, 'bleu_score': 0.752950274070398, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11574599102348346124}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '398932', 'title': 'Meninges', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['In mammals, the meninges are the dura mater, the arachnoid mater, and the pia mater.', 'In mammals, the meninges are the dura mater, the arachnoid mater, and the pia mater.', 'dura mater, the arachnoid mater, and the pia mater']}}]}]