Question: when was the last episode of i love lucy
[{'answer': 'May 6 , 1957', 'provenance': [{'wikipedia_id': '4299615', 'title': 'List of I Love Lucy episodes', 'start_paragraph_id': 1, 'start_character': 185, 'end_paragraph_id': 1, 'end_character': 197, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4299615', 'title': 'List of I Love Lucy episodes', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 274, 'bleu_score': 0.9560167778278961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8955507814562020775}, 'section': 'Section::::Abstract.'}]}]