Question: when did birds in the trap sing mcknight drop
[{'answer': 'September 2 , 2016', 'provenance': [{'wikipedia_id': '50481098', 'title': 'Birds in the Trap Sing McKnight', 'start_paragraph_id': 12, 'start_character': 3, 'end_paragraph_id': 12, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Release and promotion.\n'}]}, {'provenance': [{'wikipedia_id': '50481098', 'title': 'Birds in the Trap Sing McKnight', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 605, 'bleu_score': 0.702141733819011, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13314943269496375535}, 'section': 'Section::::Abstract.'}]}]