Question: when was the first tom and jerry aired
[{'answer': '1940', 'provenance': [{'wikipedia_id': '871053', 'title': 'Tom and Jerry', 'start_paragraph_id': 1, 'start_character': 78, 'end_paragraph_id': 1, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '871053', 'title': 'Tom and Jerry', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 817, 'bleu_score': 0.8851482383776991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6847394798384808859}, 'section': 'Section::::Abstract.'}]}]