Question: when do they put up tree in rockefeller center
[{'answer': 'November 29 , 2017'}, {'provenance': [{'wikipedia_id': '3313445', 'title': 'Rockefeller Center Christmas Tree', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 205, 'bleu_score': 0.5247772703728251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2057335818319845408}, 'section': 'Section::::Abstract.'}]}]