Question: when was the first cadbury chocolate bar made
[{'answer': '1897', 'provenance': [{'wikipedia_id': '41991262', 'title': 'History of Cadbury', 'start_paragraph_id': 11, 'start_character': 3, 'end_paragraph_id': 11, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::1824–1900: Early history.\n'}]}, {'provenance': [{'wikipedia_id': '41991262', 'title': 'History of Cadbury', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 102, 'bleu_score': 0.8852140475440831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 348481080483374179}, 'section': 'Section::::1824–1900: Early history.\n'}]}]