Question: what plasma protein plays a large role in osmotic pressure regulation
[{'answer': 'Serum albumin', 'provenance': [{'wikipedia_id': '598379', 'title': 'Blood proteins', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '598379', 'title': 'Blood proteins', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 611, 'bleu_score': 0.887734733756906, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11505468250359763092}, 'section': 'Section::::Abstract.'}]}]