( ( all ( that ( He ( ( is and ) ( can be ) ) ) ) ) ( ( is ( pure substance ) ) . ) )
(ROOT (S (NP (NP (DT all)) (SBAR (IN that) (S (NP (PRP He)) (VP (VP (VBZ is)) (CC and) (VP (MD can) (VP (VB be))))))) (VP (VBZ is) (NP (JJ pure) (NN substance))) (. .)))
all that He is and can be is pure substance.
(ROOT (S (NP (NNS Elements)) (VP (VBP are) (NP (NP (JJ pure) (NNS substances)) (SBAR (WHNP (WDT that)) (S (VP (VBP make) (ADVP (RB up) (DT all) (NN matter))))))) (. .)))