Question: who plays the bad guy in iron man
[{'answer': 'Jeff Bridges', 'provenance': [{'wikipedia_id': '5676692', 'title': 'Iron Man (2008 film)', 'start_paragraph_id': 25, 'start_character': 247, 'end_paragraph_id': 25, 'end_character': 259, 'bleu_score': 1.0, 'section': 'Section::::Production.:Pre-production.\n'}]}, {'provenance': [{'wikipedia_id': '5676692', 'title': 'Iron Man (2008 film)', 'start_paragraph_id': 13, 'start_character': 12, 'end_paragraph_id': 13, 'end_character': 676, 'bleu_score': 0.9698117965004671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5376015909463137070}, 'section': 'Section::::Cast.\n'}]}]