Question: when was the last time college gameday was in iowa city
[{'answer': 'September 30', 'provenance': [{'wikipedia_id': '1524751', 'title': 'College GameDay (football TV program)', 'start_paragraph_id': 50, 'start_character': 12, 'end_paragraph_id': 50, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Locations.:1995.\n'}]}]