Question: what percentage of the world's energy is fossil fuels
[{'answer': '86 %', 'provenance': [{'wikipedia_id': '9058630', 'title': 'World energy consumption', 'start_paragraph_id': 40, 'start_character': 337, 'end_paragraph_id': 40, 'end_character': 343, 'bleu_score': 1.0, 'section': 'Section::::By source.:Fossil fuels.\n'}]}, {'provenance': [{'wikipedia_id': '9058630', 'title': 'World energy consumption', 'start_paragraph_id': 40, 'start_character': 0, 'end_paragraph_id': 40, 'end_character': 362, 'bleu_score': 0.9262685672663881, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12380480608822082375}, 'section': 'Section::::By source.:Fossil fuels.\n'}]}]