Question: who plays richard harrow sister on boardwalk empire
[{'answer': 'Katherine Waterston', 'provenance': [{'wikipedia_id': '41072863', 'title': 'Richard Harrow', 'start_paragraph_id': 19, 'start_character': 104, 'end_paragraph_id': 19, 'end_character': 123, 'bleu_score': 1.0, 'section': 'Section::::Fictional biography.:Season 4.\n'}]}, {'provenance': [{'wikipedia_id': '41072863', 'title': 'Richard Harrow', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 752, 'bleu_score': 0.984904577301502, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3272414744604482955}, 'section': 'Section::::Fictional biography.:Season 4.\n'}]}]