rtokens: Berlin , Brussels and Zurich all belong to the most lucrative series in the sport , the Golden Four .
pos: RBR DT NN PRP RB VBD NN NN NNP IN NNP .
tokens: Earlier this month he also beat world champion Bailey in Zurich .
ltokens: Last Friday Mitchell , who finished fourth at the Atlanta Games , upstaged a trio of Olympic champions including Bailey to win the 100 in Brussels .