( Silicon ( ( ( is not ) ( ( the ( only element ) ) ( that ( ( forms ( giant-molecule ( ( anions and ) frameworks ) ) ) ( with oxygen ) ) ) ) ) ; ) )
(ROOT (S (NP (NNP Silicon)) (VP (VBZ is) (RB not) (NP (NP (DT the) (JJ only) (NN element)) (SBAR (WHNP (WDT that)) (S (VP (VBZ forms) (NP (JJ giant-molecule) (NNS anions) (CC and) (NNS frameworks)) (PP (IN with) (NP (NN oxygen)))))))) (: ;)))
Silicon is not the only element that forms giant-molecule anions and frameworks with oxygen;
(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))))))) (. .)))