Question: how much of the worlds energy is produced by nuclear power
[{'answer': '5 %', 'provenance': [{'wikipedia_id': '9058630', 'title': 'World energy consumption', 'start_paragraph_id': 29, 'start_character': 339, 'end_paragraph_id': 29, 'end_character': 345, 'bleu_score': 1.0, 'section': 'Section::::Overview.:Trends.\n'}]}, {'provenance': [{'wikipedia_id': '9058630', 'title': 'World energy consumption', 'start_paragraph_id': 22, 'start_character': 0, 'end_paragraph_id': 22, 'end_character': 263, 'bleu_score': 0.9569637990759251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10936677389457868626}, 'section': 'Section::::Overview.:Electricity generation.\n'}]}]