Question: Stipe Miocic has tied the record for most successful title defenses held with Randy Couture, Tim Sylvia, Brock Lesnar an an american mixed martial artists who is ranked what in UFC's official heavyweight rankings?
{'answer': '3rd', 'supporting_facts': [['Stipe Miocic', 0], ['Stipe Miocic', 3], ['Cain Velasquez', 0], ['Cain Velasquez', 2]]}