Question: where does coal come from and how is it obtained
[{'answer': 'the ground', 'provenance': [{'wikipedia_id': '5987', 'title': 'Coal', 'start_paragraph_id': 69, 'start_character': 229, 'end_paragraph_id': 69, 'end_character': 239, 'bleu_score': 1.0, 'section': 'Section::::Coal as fuel to generate electricity.:Power plant combustion.\n'}]}, {'answer': 'coal mining', 'provenance': [{'wikipedia_id': '5987', 'title': 'Coal', 'start_paragraph_id': 72, 'start_character': 337, 'end_paragraph_id': 72, 'end_character': 348, 'bleu_score': 1.0, 'section': 'Section::::Coal industry.:Coal mining.\n'}]}]