Question: in the 19th century in france what gave impressionist painters so much new subject matter
[{'answer': 'Photography', 'provenance': [{'wikipedia_id': '15169', 'title': 'Impressionism', 'start_paragraph_id': 36, 'start_character': 587, 'end_paragraph_id': 36, 'end_character': 598, 'bleu_score': 1.0, 'section': 'Section::::Content and composition.\n'}]}, {'provenance': [{'wikipedia_id': '15169', 'title': 'Impressionism', 'start_paragraph_id': 36, 'start_character': 13, 'end_paragraph_id': 36, 'end_character': 834, 'bleu_score': 0.8344330863986891, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13154911286740571215}, 'section': 'Section::::Content and composition.\n'}]}]