Question: who plays the new female mayor on blue bloods
[{'answer': 'Margaret Dutton', 'provenance': [{'wikipedia_id': '47422881', 'title': 'List of Blue Bloods characters', 'start_paragraph_id': 24, 'start_character': 360, 'end_paragraph_id': 24, 'end_character': 375, 'bleu_score': 1.0, 'section': 'Section::::Reagan family.:Frank Reagan.:As police commissioner.\n'}]}, {'provenance': [{'wikipedia_id': '47422881', 'title': 'List of Blue Bloods characters', 'start_paragraph_id': 24, 'start_character': 0, 'end_paragraph_id': 24, 'end_character': 435, 'bleu_score': 0.9731482306711111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 206346914714537002}, 'section': 'Section::::Reagan family.:Frank Reagan.:As police commissioner.\n'}]}]