Question: in the mid 1930s the bbc started broadcasting from which london landmark
[{'answer': 'Alexandra Palace', 'provenance': [{'wikipedia_id': '352308', 'title': 'BBC Television', 'start_paragraph_id': 9, 'start_character': 178, 'end_paragraph_id': 9, 'end_character': 194, 'bleu_score': 1.0, 'section': 'Section::::History of BBC Television.:Early years (before 1939).\n'}]}, {'provenance': [{'wikipedia_id': '352308', 'title': 'BBC Television', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 945, 'bleu_score': 0.8479278285399051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12101135471235451847}, 'section': 'Section::::History of BBC Television.:Early years (before 1939).\n'}]}]