Question: who is the president of iowa state university
[{'answer': 'Wendy Wintersteen', 'provenance': [{'wikipedia_id': '21520832', 'title': 'List of Presidents of Iowa State University', 'start_paragraph_id': 280, 'start_character': 11, 'end_paragraph_id': 280, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::Presidents of Iowa State University.:Steven Leath.\n'}]}, {'provenance': [{'wikipedia_id': '21520832', 'title': 'List of Presidents of Iowa State University', 'start_paragraph_id': 281, 'start_character': 0, 'end_paragraph_id': 281, 'end_character': 129, 'bleu_score': 0.9067110266941041, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1256233432078105030}, 'section': 'Section::::Presidents of Iowa State University.:Wendy Wintersteen.\n'}]}]