Question: when did japan send cherry trees to washington dc
[{'answer': 'March 27 , 1912', 'provenance': [{'wikipedia_id': '1559325', 'title': 'National Cherry Blossom Festival', 'start_paragraph_id': 11, 'start_character': 17, 'end_paragraph_id': 11, 'end_character': 32, 'bleu_score': 1.0, 'section': 'Section::::History of the cherry blossoms.:Japanese gift planted.\n'}]}, {'provenance': [{'wikipedia_id': '1559325', 'title': 'National Cherry Blossom Festival', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 549, 'bleu_score': 0.977139080690077, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12589331410820456174}, 'section': 'Section::::Abstract.'}]}]