( ( ( ( Halides , ) ( ( the ( anion form ) ) ( of halogens ) ) ) , ) ( ( can ( be ( oxidized ( to ( the ( elemental form ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Halides)) (, ,) (NP (NP (DT the) (NN anion) (NN form)) (PP (IN of) (NP (NNS halogens)))) (, ,)) (VP (MD can) (VP (VB be) (VP (VBN oxidized) (PP (TO to) (NP (DT the) (JJ elemental) (NN form)))))) (. .)))
Halides, the anion form of halogens, can be oxidized to the elemental form.
(ROOT (S (NP (DT A) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN anion)) (VP (VBZ is) (VP (VBN formed) (SBAR (WHADVP (WRB when)) (S (NP (DT an) (NN element)) (VP (VBZ gains) (NP (QP (CD one) (CC or) (JJR more)) (NNS electrons))))))) (. .)))