Question: What item was used by Mariana Kovacevic to heal the football striker Asamoah Gyan during the 2012 African Cup of Nations?
Sentence (from "Patrick Phiri"): As a coach, Phiri led the Zambia U-20 national team to its first ever appearance at the World Youth Cup in Nigeria in 1997 and was voted Zambian Coach of the year in 1999.
Relevant evidence: No