Question: what causes fluid in the subacromial subdeltoid bursa
[{'answer': 'inflammation', 'provenance': [{'wikipedia_id': '8007767', 'title': 'Subacromial bursitis', 'start_paragraph_id': 1, 'start_character': 46, 'end_paragraph_id': 1, 'end_character': 58, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8007767', 'title': 'Subacromial bursitis', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 441, 'bleu_score': 0.9492177523638841, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16629792338028016099}, 'section': 'Section::::Abstract.'}]}]