Question: who plays chummy's mother in call the midwife
[{'answer': 'Cheryl Campbell', 'provenance': [{'wikipedia_id': '49808705', 'title': 'List of Call the Midwife characters', 'start_paragraph_id': 100, 'start_character': 12, 'end_paragraph_id': 100, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Previous recurring characters.\n'}]}, {'provenance': [{'wikipedia_id': '49808705', 'title': 'List of Call the Midwife characters', 'start_paragraph_id': 100, 'start_character': 0, 'end_paragraph_id': 100, 'end_character': 79, 'bleu_score': 0.722160038719837, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13839500195795107425}, 'section': 'Section::::Previous recurring characters.\n'}]}, {'provenance': [{'wikipedia_id': '49808705', 'title': 'List of Call the Midwife characters', 'section': 'Section::::Previous recurring characters.\n', 'start_paragraph_id': 100, 'end_paragraph_id': 100, 'meta': {'evidence_span': ['Cheryl Campbell', "Cheryl Campbell as Lady Browne, Chummy's mother (Series 1, Series 3)", "Cheryl Campbell as Lady Browne, Chummy's mother"]}}]}]