Question: who is the youngest world champion in wwe history
[{'answer': 'Brock Lesnar', 'provenance': [{'wikipedia_id': '630463', 'title': 'WWE Championship', 'start_paragraph_id': 12, 'start_character': 418, 'end_paragraph_id': 12, 'end_character': 430, 'bleu_score': 1.0, 'section': 'Section::::History.:Championship disputes.\n'}]}, {'provenance': [{'wikipedia_id': '630463', 'title': 'WWE Championship', 'start_paragraph_id': 43, 'start_character': 0, 'end_paragraph_id': 43, 'end_character': 758, 'bleu_score': 0.9661808264736941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2821749475035594595}, 'section': 'Section::::Reigns.\n'}]}]