Question: what does mpv stand for in a cbc test
[{'answer': 'Mean platelet volume', 'provenance': [{'wikipedia_id': '3827613', 'title': 'Mean platelet volume', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3827613', 'title': 'Mean platelet volume', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 398, 'bleu_score': 0.9699161750394991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8789799836417093249}, 'section': 'Section::::Abstract.'}]}]