(S (S (NP (BASENP (DT The) (NN process)) (PP (IN of) (BASENP (NN conversion)))) (VP (VBZ modifies) (NP (BASENP (DT the) (NN uranium) (NNS oxides)) (PP (IN into) (BASENP (NN uranium) (NN hexafluoride)))))) (PERIOD .))