Question: the percentage of red blood cells compared to blood volume is known as
[{'answer': 'hematocrit', 'provenance': [{'wikipedia_id': '3997', 'title': 'Blood', 'start_paragraph_id': 23, 'start_character': 439, 'end_paragraph_id': 23, 'end_character': 449, 'bleu_score': 1.0, 'section': 'Section::::Constituents.:In mammals.:Cells.\n'}]}, {'provenance': [{'wikipedia_id': '3997', 'title': 'Blood', 'start_paragraph_id': 23, 'start_character': 0, 'end_paragraph_id': 23, 'end_character': 613, 'bleu_score': 0.9804854598160591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3847236653493742673}, 'section': 'Section::::Constituents.:In mammals.:Cells.\n'}]}]