Question: important in facilitating the conversion of american industry to mass production was
[{'answer': 'The development of machine tools', 'provenance': [{'wikipedia_id': '14914', 'title': 'Industrial Revolution', 'start_paragraph_id': 67, 'start_character': 134, 'end_paragraph_id': 67, 'end_character': 166, 'bleu_score': 1.0, 'section': 'Section::::Important technological developments.:Iron industry.:Iron process innovations.\n'}]}, {'answer': 'the system of interchangeable parts', 'provenance': [{'wikipedia_id': '14914', 'title': 'Industrial Revolution', 'start_paragraph_id': 236, 'start_character': 287, 'end_paragraph_id': 236, 'end_character': 322, 'bleu_score': 1.0, 'section': 'Section::::Industrialisation beyond the United Kingdom.:United States.\n'}]}, {'provenance': [{'wikipedia_id': '14914', 'title': 'Industrial Revolution', 'start_paragraph_id': 236, 'start_character': 0, 'end_paragraph_id': 236, 'end_character': 426, 'bleu_score': 0.9716239638199891, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13349050048903792265}, 'section': 'Section::::Industrialisation beyond the United Kingdom.:United States.\n'}]}]