( Element ( ( An element ) ( ( is ( ( a substance ) ( that ( ( can not ) ( be ( ( split chemically ) ( into ( simpler substances ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Element)) (NP (DT An) (NN element)) (VP (VBZ is) (NP (NP (DT a) (NN substance)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (RB not) (VP (VB be) (VP (VBN split) (ADVP (RB chemically)) (PP (IN into) (NP (JJR simpler) (NNS substances)))))))))) (. .)))
Element An element is a substance that cannot be split chemically into simpler substances.
(ROOT (S (NP (NP (NNS Substances)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (RB not) (VP (VB be) (VP (VBN broken) (PRT (RP down)) (PP (IN into) (NP (NP (JJR simpler) (NNS substances)) (PP (IN with) (NP (JJ different) (NNS properties))))))))))) (VP (VBP are) (VP (VBN called) (NP (NNS elements)))) (. .)))