Question: when was harambe brought to the cincinnati zoo
[{'answer': 'September 18 , 2014', 'provenance': [{'wikipedia_id': '6975043', 'title': 'Killing of Harambe', 'start_paragraph_id': 4, 'start_character': 3, 'end_paragraph_id': 4, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'provenance': [{'wikipedia_id': '6975043', 'title': 'Killing of Harambe', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 149, 'bleu_score': 0.9214109120166031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9995952033610616912}, 'section': 'Section::::Background.\n'}]}]