Question: the inventor of the popular roll-film camera was
[{'answer': 'Peter Houston', 'provenance': [{'wikipedia_id': '176654', 'title': 'Roll film', 'start_paragraph_id': 4, 'start_character': 40, 'end_paragraph_id': 4, 'end_character': 53, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '176654', 'title': 'Roll film', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 610, 'bleu_score': 0.727887571510757, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9602150812802508103}, 'section': 'Section::::History.\n'}]}]