Question: where are the bbc proms held in london
[{'answer': 'Royal Albert Hall', 'provenance': [{'wikipedia_id': '159359', 'title': 'The Proms', 'start_paragraph_id': 1, 'start_character': 139, 'end_paragraph_id': 1, 'end_character': 156, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '159359', 'title': 'The Proms', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 676, 'bleu_score': 0.7352777761071261, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15927420213452666493}, 'section': 'Section::::Abstract.'}]}]