Question: who played marlene mcfly in back to the future
[{'answer': 'Michael J. Fox', 'provenance': [{'wikipedia_id': '5299314', 'title': 'List of Back to the Future characters', 'start_paragraph_id': 5, 'start_character': 42, 'end_paragraph_id': 5, 'end_character': 56, 'bleu_score': 1.0, 'section': 'Section::::Main characters.:Marty McFly.\n'}]}, {'provenance': [{'wikipedia_id': '5299314', 'title': 'List of Back to the Future characters', 'start_paragraph_id': 27, 'start_character': 0, 'end_paragraph_id': 27, 'end_character': 144, 'bleu_score': 0.765267738479912, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9511533832005331140}, 'section': 'Section::::McFly family.:Marty Jr. and Marlene McFly.\n'}]}]