Question: how many episodes of greenleaf in season 2
[{'answer': '16', 'provenance': [{'wikipedia_id': '47636431', 'title': 'Greenleaf (TV series)', 'start_paragraph_id': 1, 'start_character': 330, 'end_paragraph_id': 1, 'end_character': 332, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]