Question: where does the white house get their christmas tree
[{'answer': 'various growers nationwide', 'provenance': [{'wikipedia_id': '3351219', 'title': 'White House Christmas tree', 'start_paragraph_id': 17, 'start_character': 48, 'end_paragraph_id': 17, 'end_character': 74, 'bleu_score': 1.0, 'section': 'Section::::Tree.:Description.\n'}]}, {'provenance': [{'wikipedia_id': '3351219', 'title': 'White House Christmas tree', 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 449, 'bleu_score': 0.9738505480425671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9325666245570200707}, 'section': 'Section::::Tree.:Description.\n'}]}]