(S (S (S (NP (NP (BASENP (NNP Amtrak) (POS 's)) (NN locomotive)) (PRN (COMMA ,) (BASENP (DT a) (NNP GE) (NNP Genesis)) (COMMA ,))) (VP (VBD was) (VP (VBN derailed) (PP (IN by) (NP (BASENP (DT the) (NN force)) (PP (IN of) (BASENP (DT the) (NN impact)))))))) (COMMA ,) (SBAR (IN although) (S (NP (BASENP (DT the) (NN rest)) (PP (IN of) (BASENP (DT the) (NN passenger) (NN train)))) (VP (VBD remained) (PP (IN on) (BASENP (DT the) (NNS tracks))))))) (PERIOD .))