Question: who introduced the flexible film to the market
[{'answer': 'George Eastman', 'provenance': [{'wikipedia_id': '21556842', 'title': 'Photographic film', 'start_paragraph_id': 6, 'start_character': 54, 'end_paragraph_id': 6, 'end_character': 68, 'bleu_score': 1.0, 'section': 'Section::::History of film.\n'}]}, {'provenance': [{'wikipedia_id': '21556842', 'title': 'Photographic film', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 427, 'bleu_score': 0.9716239638199891, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16471335929459086249}, 'section': 'Section::::History of film.\n'}]}]