( ( ( intermediate ( anion-radicals ( -RRB- assesses ) ) ) ( the ( one ( electron redn ) ) ) ) . )
(ROOT (NP (NP (JJ intermediate) (JJ anion-radicals) (-RRB- -RRB-) (NNS assesses)) (NP (DT the) (CD one) (NN electron) (NN redn)) (. .)))
intermediate anion-radicals) assesses the one electron redn.
(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))))))) (. .)))