(S (S (NP (NP (BASENP (DT The) (NN strain)) (PP (IN of) (BASENP (NN bird) (NN flu)))) (VP (VBN used) (PP (IN for) (BASENP (DT the) (NNS trials))))) (VP (VBD was) (VP (VP (VBN taken) (PP (IN from) (NP (BASENP (DT a) (NN bird) (NN flu) (NN victim)) (PP (IN in) (BASENP (NNP Vietnam)))))) (CC and) (VP (VBN neutralised) (S (VP (TO to) (VP (VP (VB prevent) (BASENP (PRP it))) (PP (IN from) (S (VP (VBG being) (ADJP (JJ contagious)))))))))))) (PERIOD .))