Question: when did chocolate easter eggs originate in the uk
[{'answer': '1873', 'provenance': [{'wikipedia_id': '9324', 'title': 'Easter egg', 'start_paragraph_id': 58, 'start_character': 3, 'end_paragraph_id': 58, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Variants.:Chocolate eggs.\n'}]}, {'provenance': [{'wikipedia_id': '9324', 'title': 'Easter egg', 'start_paragraph_id': 58, 'start_character': 0, 'end_paragraph_id': 58, 'end_character': 87, 'bleu_score': 0.8702397637697911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12584203640507199114}, 'section': 'Section::::Variants.:Chocolate eggs.\n'}]}]