Question: Joan Carden AO OBE, is an Australian operatic soprano, and has been described as "a worthy successor to Dame Nellie Melba and Dame Joan Sutherland, Dame Nellie Melba GBE, born Helen Porter Mitchell, was an Australian operatic soprano, she took the pseudonym what, from Melbourne, her home town?
{'answer': 'Melba', 'supporting_facts': [['Joan Carden', 1], ['Nellie Melba', 3]]}