Question: when does greys anatomy season 13 come on now tv
[{'answer': 'September 22 , 2016', 'provenance': [{'wikipedia_id': '50555613', 'title': "Grey's Anatomy (season 13)", 'start_paragraph_id': 52, 'start_character': 133, 'end_paragraph_id': 52, 'end_character': 152, 'bleu_score': 1.0, 'section': 'Section::::Production.:Development.\n'}]}]