Question: Babatunde Gwandoya has been a Nigerian football agent since which year, during his career, he has managed some of the largest stars of African football, including Salomon Kalou?
Sentence (from "Salomon Kalou"): Salomon Armand Magloire Kalou (born 5 August 1985) is an Ivorian footballer who plays as a striker and winger for German club Hertha BSC and the Ivory Coast national team.
Relevant evidence: Yes