( ( ( ( ( You ( can ( ( join ( different elements ) ) ( to ( make ( ( ( more complicated ) substances ) ( called compounds ) ) ) ) ) ) ) , ) but ) ( you ( ( can not ) ( ( break ( an element ) ) ( into ( ( a ( simpler kind ) ) ( of substance ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (PRP You)) (VP (MD can) (VP (VB join) (NP (JJ different) (NNS elements)) (S (VP (TO to) (VP (VB make) (NP (NP (ADJP (RBR more) (JJ complicated)) (NNS substances)) (VP (VBN called) (NP (NNS compounds)))))))))) (, ,) (CC but) (S (NP (PRP you)) (VP (MD can) (RB not) (VP (VB break) (NP (DT an) (NN element)) (PP (IN into) (NP (NP (DT a) (JJR simpler) (NN kind)) (PP (IN of) (NP (NN substance)))))))) (. .)))
You can join different elements to make more complicated substances called compounds, but you cannot break an element into a simpler kind of substance.
(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)))) (. .)))