Question: how many rooms is there in buckingham palace
[{'answer': '775', 'provenance': [{'wikipedia_id': '3969', 'title': 'Buckingham Palace', 'start_paragraph_id': 4, 'start_character': 467, 'end_paragraph_id': 4, 'end_character': 470, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '775 rooms', 'provenance': [{'wikipedia_id': '3969', 'title': 'Buckingham Palace', 'start_paragraph_id': 4, 'start_character': 467, 'end_paragraph_id': 4, 'end_character': 476, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3969', 'title': 'Buckingham Palace', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 696, 'bleu_score': 0.9829771687435411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4095658040044284010}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3969', 'title': 'Buckingham Palace', 'section': 'Section::::Abstract.', 'start_paragraph_id': 4, 'end_paragraph_id': 4, 'meta': {'evidence_span': ['The original early 19th-century interior designs, many of which survive, include widespread use of brightly coloured scagliola and blue and pink lapis, on the advice of Sir\xa0Charles Long. King Edward\xa0VII oversaw a partial redecoration in a "Belle Époque" cream and gold colour scheme. Many smaller reception rooms are furnished in the Chinese regency style with furniture and fittings brought from the Royal Pavilion at Brighton and from Carlton House. The palace has 775 rooms, and the garden is the largest private garden in London. The state rooms, used for official and state entertaining, are open to the pub', 'The original early 19th-century interior designs, many of which survive, include widespread use of brightly coloured scagliola and blue and pink lapis, on the advice of Sir\xa0Charles Long. King Edward\xa0VII oversaw a partial redecoration in a "Belle Époque" cream and gold colour scheme. Many smaller reception rooms are furnished in the Chinese regency style with furniture and fittings brought from the Royal Pavilion at Brighton and from Carlton House. The palace has 775 rooms, and the garden is the largest private garden in London. The state rooms, used for official and state entertaining, are open to the public each year for most of August and September and on some days in winter and spring.']}}]}]