( ( In ( the ( latter cases ) ) ) ( , ( ( the ( oxygen atom ) ) ( ( forms ( ( ( ( a link ) ( between ( two ( silicon atoms ) ) ) ) , ) ( ( ( ( analogous ( to ( ( the ( ether linkage ) ) ( in ( organic chemicals ) ) ) ) ) , ) and ) ( identical ( to ( ( the bonding ) ( in ( silicon dioxide ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT the) (JJ latter) (NNS cases))) (, ,) (NP (DT the) (NN oxygen) (NN atom)) (VP (VBZ forms) (NP (NP (DT a) (NN link)) (PP (IN between) (NP (CD two) (NN silicon) (NNS atoms))) (, ,) (ADJP (ADJP (JJ analogous) (PP (TO to) (NP (NP (DT the) (NN ether) (NN linkage)) (PP (IN in) (NP (JJ organic) (NNS chemicals)))))) (, ,) (CC and) (ADJP (JJ identical) (PP (TO to) (NP (NP (DT the) (NN bonding)) (PP (IN in) (NP (NN silicon) (NN dioxide))))))))) (. .)))
In the latter cases, the oxygen atom forms a link between two silicon atoms, analogous to the ether linkage in organic chemicals, and identical to the bonding in silicon dioxide.
(ROOT (S (NP (NNS Ethers)) (VP (VBP are) (VP (VBN composed) (PP (IN of) (NP (NP (DT an) (NN oxygen) (NN atom)) (SBAR (WHNP (WDT that)) (S (VP (VBZ forms) (NP (JJ single) (NNS bonds)) (PP (IN with) (NP (CD two) (NN carbon) (NNS atoms)))))))))) (. .)))