(S (S (NP (BASENP (NN Two) (NN train) (NNS derailments)) (PP (IN in) (BASENP (NN two) (NNS days)))) (VP (VBP have) (VP (VBN closed) (NP (BASENP (NN railway) (NNS lines)) (PP (IN in) (BASENP (NNP Australia))))))) (PERIOD .))