Question: when was the black and white camera invented
[{'answer': '1839', 'provenance': [{'wikipedia_id': '2435889', 'title': 'History of photography', 'start_paragraph_id': 3, 'start_character': 547, 'end_paragraph_id': 3, 'end_character': 551, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2435889', 'title': 'History of photography', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 621, 'bleu_score': 0.506402476320138, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7759306903076261774}, 'section': 'Section::::Abstract.'}]}]