Question: when did opp by naughty by nature come out
[{'answer': 'August 1991', 'provenance': [{'wikipedia_id': '5064824', 'title': 'O.P.P. (song)', 'start_paragraph_id': 1, 'start_character': 83, 'end_paragraph_id': 1, 'end_character': 94, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5064824', 'title': 'O.P.P. (song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 395, 'bleu_score': 0.5217625277537891, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9515995006159684952}, 'section': 'Section::::Abstract.'}]}]