Question: when is the season 12 finale of americas got talent
[{'answer': 'September', 'provenance': [{'wikipedia_id': '51620827', 'title': "America's Got Talent (season 12)", 'start_paragraph_id': 3, 'start_character': 62, 'end_paragraph_id': 3, 'end_character': 71, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '51620827', 'title': "America's Got Talent (season 12)", 'start_paragraph_id': 50, 'start_character': 0, 'end_paragraph_id': 50, 'end_character': 128, 'bleu_score': 0.910879922930628, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11356305220024261866}, 'section': 'Section::::Finals.\n'}]}]