Question: when was the british broadcasting corporation (bbc) founded
[{'answer': '1 January 1927', 'provenance': [{'wikipedia_id': '19344654', 'title': 'BBC', 'start_paragraph_id': 16, 'start_character': 60, 'end_paragraph_id': 16, 'end_character': 74, 'bleu_score': 1.0, 'section': 'Section::::History.:1927 to 1939.\n'}]}, {'provenance': [{'wikipedia_id': '19344654', 'title': 'BBC', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 296, 'bleu_score': 0.9560167778278961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13635255081426065732}, 'section': 'Section::::History.:1927 to 1939.\n'}]}]