Question: when did season 4 of better call saul start
[{'answer': 'August 6 , 2018', 'provenance': [{'wikipedia_id': '49549964', 'title': 'Better Call Saul (season 4)', 'start_paragraph_id': 1, 'start_character': 90, 'end_paragraph_id': 1, 'end_character': 105, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '49549964', 'title': 'Better Call Saul (season 4)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 386, 'bleu_score': 0.9204199807826591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2472391500495601227}, 'section': 'Section::::Abstract.'}]}]