Question: when did bears ears become a national monument
[{'answer': 'December 28 , 2016', 'provenance': [{'wikipedia_id': '52722576', 'title': 'Bears Ears National Monument', 'start_paragraph_id': 42, 'start_character': 3, 'end_paragraph_id': 42, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Designation under President Obama.\n'}]}, {'provenance': [{'wikipedia_id': '52722576', 'title': 'Bears Ears National Monument', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 733, 'bleu_score': 0.9067715455394211, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17963552312437766813}, 'section': 'Section::::Abstract.'}]}]