Question: how did the dupont family make their fortune
[{'answer': 'black powder manufacturing', 'provenance': [{'wikipedia_id': '965906', 'title': 'Du Pont family', 'start_paragraph_id': 9, 'start_character': 53, 'end_paragraph_id': 9, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '965906', 'title': 'Du Pont family', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 528, 'bleu_score': 0.978375183951072, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10468306540627939680}, 'section': 'Section::::History.\n'}]}]