( ( ( Ethers - ) ( ( oxygen ( singly bonded ) ) ( to ( two ( carbon atoms ) ) ) ) ) . )
(ROOT (NP (NP (NNS Ethers)) (: -) (NP (NP (NN oxygen) (NN singly) (NNS bonded)) (PP (TO to) (NP (CD two) (NN carbon) (NNS atoms)))) (. .)))
Ethers -oxygen singly bonded to two carbon atoms.
(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)))))))))) (. .)))