Question: who plays smithys sister in gavin and stacey
[{'answer': 'Sheridan Smith', 'provenance': [{'wikipedia_id': '25831483', 'title': 'List of Gavin & Stacey characters', 'start_paragraph_id': 18, 'start_character': 31, 'end_paragraph_id': 18, 'end_character': 45, 'bleu_score': 1.0, 'section': 'Section::::Characters.:Other characters.\n'}]}, {'provenance': [{'wikipedia_id': '25831483', 'title': 'List of Gavin & Stacey characters', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 176, 'bleu_score': 0.7456495553738951, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13300691210271626349}, 'section': 'Section::::Characters.:Other characters.\n'}]}]