Assertion: gymnast | /r/HasProperty | won at medal
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text: Although Europeans countries have been always dominant in this sport (only four World Championships have been held outside Europe so far, one in Cuba, one in USA and two in Japan) and only five gymnasts (Mitsuru Hiraguchi, Sun Duk Jo, Myong Sim Choi, Son Yeon-jae, Kaho Minagawa) and two groups (Japan and North Korea) have won at medals at the World Championships, rhythmic gymnastics is growing.