Question: who invented refrigerator & what year was it invented
[{'answer': 'William Cullen', 'provenance': [{'wikipedia_id': '1036259', 'title': 'Refrigerator', 'start_paragraph_id': 8, 'start_character': 70, 'end_paragraph_id': 8, 'end_character': 84, 'bleu_score': 1.0, 'section': 'Section::::History.:Refrigeration technology.\n'}]}, {'answer': '1755', 'provenance': [{'wikipedia_id': '1036259', 'title': 'Refrigerator', 'start_paragraph_id': 8, 'start_character': 127, 'end_paragraph_id': 8, 'end_character': 131, 'bleu_score': 1.0, 'section': 'Section::::History.:Refrigeration technology.\n'}]}, {'provenance': [{'wikipedia_id': '1036259', 'title': 'Refrigerator', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 370, 'bleu_score': 0.9663744727315161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12099975873048235067}, 'section': 'Section::::History.:Refrigeration technology.\n'}]}]