( ( Individual substances ) ( ( are ( called ( ( elements , ) ( substance ( which ( ( can not ) ( be ( ( ( broken down ) or ) ( subdivided ( by ( ordinary ( chemical means ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Individual) (NNS substances)) (VP (VBP are) (VP (VBN called) (NP (NP (NNS elements)) (, ,) (NP (NP (NN substance)) (SBAR (WHNP (WDT which)) (S (VP (MD can) (RB not) (VP (VB be) (VP (VP (VBN broken) (PRT (RP down))) (CC or) (VP (VBN subdivided) (PP (IN by) (NP (JJ ordinary) (NN chemical) (NNS means))))))))))))) (. .)))
Individual substances are called elements , substance which cannot be broken down or subdivided by ordinary chemical means.
(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)))) (. .)))