( ( 1 -RRB- ) ( ( In ( ( chemistry and ) physics ) ) ( , ( ( an element ) ( ( is ( ( a substance ) ( that ( ( can not ) ( be ( ( ( broken down ) ( into ( simpler components ) ) ) ( by ( any ( non-nuclear ( chemical reaction ) ) ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (LST (LS 1) (-RRB- -RRB-)) (PP (IN In) (NP (NN chemistry) (CC and) (NN physics))) (, ,) (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 broken) (PRT (RP down)) (PP (IN into) (NP (JJR simpler) (NNS components))) (PP (IN by) (NP (DT any) (JJ non-nuclear) (NN chemical) (NN reaction)))))))))) (. .)))
1) In chemistry and physics, an element is a substance that cannot be broken down into simpler components by any non-nuclear chemical reaction.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (DT a) (NN substance)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (RB not) (VP (VB be) (VP (VBN broken) (PRT (RP down)) (PP (TO to) (NP (JJ other) (NNS substances))) (PP (IN by) (NP (NP (NN chemical) (NNS reactions)) (NP (DT an) (NN element))))))))))) (. .)))