rtokens: Among the crowd on Friday were Olympic 100 metres champions going back to 1948 .
pos: NNP , NNP CC NNP DT VB TO DT RBS JJ NN IN DT NN , DT NNP CD .
tokens: Berlin , Brussels and Zurich all belong to the most lucrative series in the sport , the Golden Four .
ltokens: Earlier this month he also beat world champion Bailey in Zurich .