(S (S (NP (BASENP (JJ Preliminary) (NNS trials)) (PP (IN for) (BASENP (DT the) (NN vaccine)))) (VP (VBP have) (VP (VBN been) (VP (VBN conducted) (PP (PP (IN in) (NP (BASENP (DT the) (NNPS Americas)) (CC and) (BASENP (NNP Australia)))) (CONJP (ADVP (RB as) (RB well)) (IN as)) (PP (IN in) (BASENP (NNP Africa)))))))) (PERIOD .))