Question: who bought the old american embassy in london
[{'answer': 'Qatari Diar', 'provenance': [{'wikipedia_id': '3103964', 'title': 'Embassy of the United States, London', 'start_paragraph_id': 15, 'start_character': 157, 'end_paragraph_id': 15, 'end_character': 168, 'bleu_score': 1.0, 'section': 'Section::::History.:New building.\n'}]}, {'provenance': [{'wikipedia_id': '3103964', 'title': 'Embassy of the United States, London', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 616, 'bleu_score': 0.9804854598160591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10622783084832882673}, 'section': 'Section::::History.:New building.\n'}]}]