( ( An element ) ( ( is ( matter ( that ( is ( ( made up ) ( of ( ( only ( one type ) ) ( of atom ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT An) (NN element)) (VP (VBZ is) (NP (NP (NN matter)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (VP (VBN made) (PRT (RP up)) (PP (IN of) (NP (NP (RB only) (CD one) (NN type)) (PP (IN of) (NP (NN atom))))))))))) (. .)))
An element is matter that is made up of only one type 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))))))))))) (. .)))