Question: when was the first residential air conditioning system invented
[{'answer': '1914', 'provenance': [{'wikipedia_id': '7221088', 'title': 'Air conditioning', 'start_paragraph_id': 20, 'start_character': 96, 'end_paragraph_id': 20, 'end_character': 100, 'bleu_score': 1.0, 'section': 'Section::::History.:Electrical air conditioning.\n'}]}, {'provenance': [{'wikipedia_id': '7221088', 'title': 'Air conditioning', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 558, 'bleu_score': 0.977397480575333, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10004480502699868662}, 'section': 'Section::::History.:Electrical air conditioning.\n'}]}]