Question: who played marty mcfly's father in back to the future
[{'answer': 'Crispin Glover', 'provenance': [{'wikipedia_id': '5299314', 'title': 'List of Back to the Future characters', 'start_paragraph_id': 13, 'start_character': 35, 'end_paragraph_id': 13, 'end_character': 49, 'bleu_score': 1.0, 'section': 'Section::::McFly family.:George McFly.\n'}]}, {'provenance': [{'wikipedia_id': '5299314', 'title': 'List of Back to the Future characters', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 474, 'bleu_score': 0.977897140678983, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8777611972051201174}, 'section': 'Section::::McFly family.:George McFly.\n'}]}]