Question: what is the most common source of electricity in manitoba
[{'answer': 'Manitoba Hydro', 'provenance': [{'wikipedia_id': '1254133', 'title': 'Manitoba Hydro', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1254133', 'title': 'Manitoba Hydro', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 799, 'bleu_score': 0.984062469849008, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6876257930727435076}, 'section': 'Section::::Abstract.'}]}]