Question: howard stark is the father of what superhero
[{'answer': 'Iron Man', 'provenance': [{'wikipedia_id': '15821616', 'title': 'Howard Stark', 'start_paragraph_id': 4, 'start_character': 110, 'end_paragraph_id': 4, 'end_character': 118, 'bleu_score': 1.0, 'section': 'Section::::Publication history.\n'}]}, {'provenance': [{'wikipedia_id': '15821616', 'title': 'Howard Stark', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 967, 'bleu_score': 0.9709797067861031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6129126036475504388}, 'section': 'Section::::Publication history.\n'}]}]