Question: who played marty mcfly's mother in back to the future
[{'answer': 'Lea Thompson', 'provenance': [{'wikipedia_id': '5299314', 'title': 'List of Back to the Future characters', 'start_paragraph_id': 17, 'start_character': 36, 'end_paragraph_id': 17, 'end_character': 48, 'bleu_score': 1.0, 'section': 'Section::::McFly family.:Lorraine Baines-McFly.\n'}]}, {'provenance': [{'wikipedia_id': '5299314', 'title': 'List of Back to the Future characters', 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 343, 'bleu_score': 0.9669306597086381, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10541900641235192284}, 'section': 'Section::::McFly family.:Lorraine Baines-McFly.\n'}]}]