Question: when did they dump tea into the harbor
[{'answer': 'December 16 , 1773', 'provenance': [{'wikipedia_id': '4608353', 'title': 'Boston Tea Party', 'start_paragraph_id': 1, 'start_character': 112, 'end_paragraph_id': 1, 'end_character': 130, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]