Question: when was the last time a number one seed didn't make the final four
[{'answer': '2011', 'provenance': [{'wikipedia_id': '507399', 'title': "NCAA Division I Men's Basketball Tournament", 'start_paragraph_id': 3, 'start_character': 177, 'end_paragraph_id': 3, 'end_character': 181, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '507399', 'title': "NCAA Division I Men's Basketball Tournament", 'start_paragraph_id': 231, 'start_character': 0, 'end_paragraph_id': 231, 'end_character': 89, 'bleu_score': 0.861173529963367, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14106811600342019641}, 'section': 'Section::::Tournament statistics.:Highly seeded teams.:Final Fours without a No. 1 seed.\n'}]}]