Question: who plays barbara on girlfriends guide to divorce
[{'answer': 'Retta', 'provenance': [{'wikipedia_id': '42000506', 'title': "Girlfriends' Guide to Divorce", 'start_paragraph_id': 1, 'start_character': 903, 'end_paragraph_id': 1, 'end_character': 908, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '42000506', 'title': "Girlfriends' Guide to Divorce", 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 103, 'bleu_score': 0.501475667789348, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8642587495254161713}, 'section': 'Section::::Cast.:Main.\n'}]}]