Question: who is the owner of 21st century fox
[{'answer': 'Murdoch family', 'provenance': [{'wikipedia_id': '37821711', 'title': '21st Century Fox', 'start_paragraph_id': 20, 'start_character': 530, 'end_paragraph_id': 20, 'end_character': 544, 'bleu_score': 1.0, 'section': 'Section::::History.:Subsequent history.\n'}]}]