Question: who plays jack porter's mother in revenge
[{'answer': "Gail O'Grady", 'provenance': [{'wikipedia_id': '34854474', 'title': 'List of Revenge characters', 'start_paragraph_id': 25, 'start_character': 12, 'end_paragraph_id': 25, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Recurring cast.\n'}]}, {'provenance': [{'wikipedia_id': '34854474', 'title': 'List of Revenge characters', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 827, 'bleu_score': 0.969191309144216, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3536875405813283878}, 'section': 'Section::::Recurring cast.\n'}]}]