Question: when did kraft start making macaroni and cheese
[{'answer': '1937', 'provenance': [{'wikipedia_id': '301932', 'title': 'Kraft Dinner', 'start_paragraph_id': 1, 'start_character': 475, 'end_paragraph_id': 1, 'end_character': 479, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '301932', 'title': 'Kraft Dinner', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 479, 'bleu_score': 0.5685618158811531, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17088595628170322500}, 'section': 'Section::::Abstract.'}]}]