Question: when were peanut butter m&m's first introduced
[{'answer': '1954', 'provenance': [{'wikipedia_id': '485487', 'title': "M&M's", 'start_paragraph_id': 8, 'start_character': 109, 'end_paragraph_id': 8, 'end_character': 113, 'bleu_score': 1.0, 'section': 'Section::::History.:1940–70s.\n'}]}, {'provenance': [{'wikipedia_id': '485487', 'title': "M&M's", 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 133, 'bleu_score': 0.9243880458347601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10090169690335946648}, 'section': 'Section::::History.:1940–70s.\n'}]}]