Question: when was beijing made the capital of china
[{'answer': '1279', 'provenance': [{'wikipedia_id': '6934277', 'title': 'History of Beijing', 'start_paragraph_id': 1, 'start_character': 616, 'end_paragraph_id': 1, 'end_character': 620, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6934277', 'title': 'History of Beijing', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 998, 'bleu_score': 0.9019466191040121, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9913322196879067641}, 'section': 'Section::::Abstract.'}]}]