Question: who did david ryall play in call the midwife
[{'answer': 'Tommy Mills', 'provenance': [{'wikipedia_id': '13177958', 'title': 'David Ryall', 'start_paragraph_id': 14, 'start_character': 67, 'end_paragraph_id': 14, 'end_character': 78, 'bleu_score': 1.0, 'section': 'Section::::Career.\n'}]}, {'provenance': [{'wikipedia_id': '13177958', 'title': 'David Ryall', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 184, 'bleu_score': 0.943604326170661, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15093662009363811022}, 'section': 'Section::::Career.\n'}]}]