Question: Which genus has more species, Echium or Ptilotus?
{'answer': 'Ptilotus', 'supporting_facts': [['Echium', 0], ['Ptilotus', 0], ['Ptilotus', 1], ['Ptilotus', 2], ['Ptilotus', 3], ['Ptilotus', 7], ['Ptilotus', 9]]}