Question: What item was used by Mariana Kovacevic to heal the football striker Asamoah Gyan during the 2012 African Cup of Nations?
Sentence (from "Asamoah Gyan"): Asamoah Gyan ( , , born 22 November 1985 in Accra) is a Ghanaian professional footballer who plays as a striker for Kayserispor and captains the Ghanaian national team.
Relevant evidence: Yes