( Subject ( ( matter ( wherein ( ( the ( cyclic ether ) ) ( ( contains ( only ( a ( single ( three-membered ( heterocyclic ring ) ) ) ) ) ) ( ( having ( ( ( two ( carbon atoms ) ) and ) ( one ( oxygen atom ) ) ) ) ( as ( ring members ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Subject)) (VP (NN matter) (SBAR (WHADVP (WRB wherein)) (S (NP (DT the) (JJ cyclic) (NN ether)) (VP (VBZ contains) (NP (RB only) (DT a) (JJ single) (JJ three-membered) (JJ heterocyclic) (NN ring)) (S (VP (VBG having) (NP (NP (CD two) (NN carbon) (NNS atoms)) (CC and) (NP (CD one) (NN oxygen) (NN atom))) (PP (IN as) (NP (NN ring) (NNS members))))))))) (. .)))
Subject matter wherein the cyclic ether contains only a single three-membered heterocyclic ring having two carbon atoms and one oxygen atom as ring members.
(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)))))))))) (. .)))