Question: Do Antonio Mercader and Doris Köhler have the same nationality?
Sentence (from "Doris Köhler"): Since 2002, she has won a total of seven World Championships and four European Championship titles in light- and full- contact kickboxing according to the rules of the World Kickboxing Association( WKA), International Amateur Karate- Kickboxing Sport Association( IAKSA) and the International Sport Karate Association( ISKA).
Relevant evidence: No