Question: what is the term for a collection of blood located outside the dura mater
[{'answer': 'epidural hematoma', 'provenance': [{'wikipedia_id': '636935', 'title': 'Dura mater', 'start_paragraph_id': 25, 'start_character': 229, 'end_paragraph_id': 25, 'end_character': 246, 'bleu_score': 1.0, 'section': 'Section::::Clinical significance.\n'}]}, {'provenance': [{'wikipedia_id': '636935', 'title': 'Dura mater', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 840, 'bleu_score': 0.9676402440805071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9779099137522553598}, 'section': 'Section::::Clinical significance.\n'}]}]