Question: when did brides start wearing white wedding dresses
[{'answer': '1840', 'provenance': [{'wikipedia_id': '460087', 'title': 'Wedding dress', 'start_paragraph_id': 6, 'start_character': 33, 'end_paragraph_id': 6, 'end_character': 37, 'bleu_score': 1.0, 'section': 'Section::::Western culture.\n'}]}, {'provenance': [{'wikipedia_id': '460087', 'title': 'Wedding dress', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 282, 'bleu_score': 0.958740481558872, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4394587871629939442}, 'section': 'Section::::Western culture.\n'}]}]