Question: how many episodes are going to be in pll season 7
[{'answer': '20', 'provenance': [{'wikipedia_id': '49091814', 'title': 'Pretty Little Liars (season 7)', 'start_paragraph_id': 1, 'start_character': 177, 'end_paragraph_id': 1, 'end_character': 179, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]