Obafemi Martins scored one goal in in Birmingham City F.C.'s 2011 final win against Arsenal, what is the nationality of the other goal-scorer?
2010–11 Birmingham City F.C. season:  They reached the quarter-final of the FA Cup and won the League Cup, their first major trophy since 1963, by beating favourites Arsenal 2–1 in the final with goals from Nikola Žigić and Obafemi Martins. Nikola Žigić: Nikola Žigić (, ] ; born 25 September 1980) is a former Serbian international footballer who played as a centre forward.
i don't know