Question: what is a solid fossil fuel that is often used to generate electricity
[{'answer': 'Wood', 'provenance': [{'wikipedia_id': '522723', 'title': 'Solid fuel', 'start_paragraph_id': 3, 'start_character': 11, 'end_paragraph_id': 3, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Types of solid fuels.\n'}]}, {'provenance': [{'wikipedia_id': '522723', 'title': 'Solid fuel', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 1218, 'bleu_score': 0.9902197551206561, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13391205580135405816}, 'section': 'Section::::Types of solid fuels.:Wood.\n'}]}]