Question: who pitched the last perfect game in baseball
[{'answer': 'Félix Hernández', 'provenance': [{'wikipedia_id': '33940138', 'title': 'List of Major League Baseball perfect games', 'start_paragraph_id': 1, 'start_character': 553, 'end_paragraph_id': 1, 'end_character': 568, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]