rtokens: Weah has admitted head butting Costa but said he reacted to racist taunts .
pos: DT NN VBD NN IN DT NNS POS NN IN DT NNP NNP POS NNP NN IN NNP CD .
tokens: The incident took place in the players ' tunnel after a European Champions ' League match on November 20 .
ltokens: Weah was suspended for one match by UEFA , European soccer 's governing body , pending a fuller investigation .