Question: being mary jane season 4 how many episodes
[{'answer': '20', 'provenance': [{'wikipedia_id': '54593544', 'title': 'List of Being Mary Jane episodes', 'start_paragraph_id': 1, 'start_character': 139, 'end_paragraph_id': 1, 'end_character': 141, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]