rtokens: " A tracheotomy was performed and supportive breathing was installed through the help of a breathing device , " he said . "
pos: " DT VBG IN DT NN POS NN NNS VBD NN NN , " JJ NN NNP NNP VBD IN DT NN .
tokens: " A worsening in the president 's lung functions took place yesterday , " presidential spokesman Ladlislav Spacek said in a statement .
ltokens: He said that the procedure to insert a device into Havel 's throat , done after his breathing worsened on Thursday , had helped , and the president 's condition significantly improved .