rtokens: Havel has been recovering from surgery on Monday which removed a small malignant tumour and half of his right lung .
pos: IN DT NNS , DT NN POS NN RB VBN . "
tokens: After these steps , the president 's condition signigicantly improved . "
ltokens: " A tracheotomy was performed and supportive breathing was installed through the help of a breathing device , " he said . "