(S (S (NP (BASENP (NN Six)) (PP (IN of) (NP (BASENP (DT the) (NN world) (POS 's)) (BASENP (JJS largest) (NN computer) (NNS companies))))) (VP (VBP are) (VP (VBG seeking) (S (VP (TO to) (VP (VB have) (S (NP (BASENP (DT a) (NN patent)) (VP (VBN held) (PP (IN by) (NP (BASENP (DT the) (JJ Australian) (NNP Government) (POS 's)) (NP (BASENP (NNP Commonwealth) (NP (BASENP (NNP Scientific) (CC and) (NNP Industrial)) (BASENP (NNP Research) (NNP Organisation)))) (PRN (LRB -LRB-) (BASENP (NNP CSIRO)) (RRB -RRB-))))))) (VP (VBN revoked))))))))) (PERIOD .))