Question: what is the name of the largest lake in manitoba
[{'answer': 'Lake Winnipeg', 'provenance': [{'wikipedia_id': '30850529', 'title': 'List of lakes of Manitoba', 'start_paragraph_id': 141, 'start_character': 12, 'end_paragraph_id': 141, 'end_character': 25, 'bleu_score': 1.0, 'section': 'Section::::W.\n'}]}]