Question: What did Mariana Kovacevic use to treat the injury of Asamoah Gyan, a Ghanaian professional footballer for a suprising fast recovery time?
{'answer': 'horse placenta', 'supporting_facts': [['Mariana Kovacevic', 0], ['Mariana Kovacevic', 1], ['Asamoah Gyan', 0]]}