Question: what is the world largest freshwater lake by volume
[{'answer': 'Baikal', 'provenance': [{'wikipedia_id': '9121362', 'title': 'List of lakes by volume', 'start_paragraph_id': 12, 'start_character': 23, 'end_paragraph_id': 12, 'end_character': 29, 'bleu_score': 1.0, 'section': 'Section::::By continent.\n'}]}]