Question: when did hershey's special dark come out
[{'answer': '1939', 'provenance': [{'wikipedia_id': '2237197', 'title': "Hershey's Special Dark", 'start_paragraph_id': 5, 'start_character': 103, 'end_paragraph_id': 5, 'end_character': 107, 'bleu_score': 1.0, 'section': 'Section::::Miniatures.\n'}]}, {'provenance': [{'wikipedia_id': '2237197', 'title': "Hershey's Special Dark", 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 141, 'bleu_score': 0.882110867756503, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17362067738089560135}, 'section': 'Section::::Miniatures.\n'}]}]