Question: who played polly in after the thin man
[{'answer': 'Dorothy McNulty', 'provenance': [{'wikipedia_id': '144637', 'title': 'After the Thin Man', 'start_paragraph_id': 1, 'start_character': 406, 'end_paragraph_id': 1, 'end_character': 421, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]