( Elements ( ( are ( composed ( of ( ( only ( one kind ) ) ( of atom ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Elements)) (VP (VBP are) (VP (VBN composed) (PP (IN of) (NP (NP (RB only) (CD one) (NN kind)) (PP (IN of) (NP (NN atom))))))) (. .)))
Elements are composed of only one kind of atom .
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (NNS elements)) (SBAR (WHNP (WDT that)) (S (VP (VBP contain) (NP (NP (JJ only) (NNS atoms)) (PP (IN of) (NP (NP (CD one) (NN type)) (PP (IN of) (NP (NN element) (NN native) (NNS elements))))))))))) (. .)))