( ( ( The classification ) ( of ( ( substance B ) ( -LRB- ( ( is ( ( an element ) ( is ( ( a compound ) ( ( can not ) ( be determined ) ) ) ) ) ) -RRB- ) ) ) ) ) . )
(ROOT (NP (NP (DT The) (NN classification)) (PP (IN of) (NP (NP (NN substance) (NN B)) (PRN (-LRB- -LRB-) (SQ (VBZ is) (NP (NP (DT an) (NN element)) (SBAR (S (VP (VBZ is) (NP (NP (DT a) (NN compound)) (SBAR (S (VP (MD can) (RB not) (VP (VB be) (VP (VBN determined)))))))))))) (-RRB- -RRB-)))) (. .)))
The classification of substance B (is an element is a compound cannot be determined ).
(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)))) (. .)))