Question: who plays the district attorney on blue bloods
[{'answer': 'Bobby Cannavale', 'provenance': [{'wikipedia_id': '47422881', 'title': 'List of Blue Bloods characters', 'start_paragraph_id': 76, 'start_character': 321, 'end_paragraph_id': 76, 'end_character': 336, 'bleu_score': 1.0, 'section': 'Section::::Reagan family.:Erin Reagan.:Biography.\n'}]}, {'provenance': [{'wikipedia_id': '47422881', 'title': 'List of Blue Bloods characters', 'start_paragraph_id': 76, 'start_character': 0, 'end_paragraph_id': 76, 'end_character': 1149, 'bleu_score': 0.9780561361801231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4428378208966487780}, 'section': 'Section::::Reagan family.:Erin Reagan.:Biography.\n'}]}]