Question: the function of a bursa is to reduce friction
[{'answer': 'between the bones', 'provenance': [{'wikipedia_id': '1944887', 'title': 'Synovial bursa', 'start_paragraph_id': 1, 'start_character': 316, 'end_paragraph_id': 1, 'end_character': 333, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1944887', 'title': 'Synovial bursa', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 413, 'bleu_score': 0.91198613574562, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3302958435310516071}, 'section': 'Section::::Abstract.'}]}]