( and ( ( every ( oxygen atom ) ) ( ( is ( bonded ( to ( two ( silicon atoms ) ) ) ) ) . ) ) )
(ROOT (S (CC and) (NP (DT every) (NN oxygen) (NN atom)) (VP (VBZ is) (ADJP (JJ bonded) (PP (TO to) (NP (CD two) (NN silicon) (NNS atoms))))) (. .)))
and every oxygen atom is bonded to two silicon atoms.
(ROOT (S (NP (DT An) (NN ether)) (VP (VBZ is) (NP (NP (DT an) (JJ organic) (NN compound)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (CD two) (NN hydrocarbon) (NNS groups)) (VP (VBP are) (VP (VBG bonded) (PP (TO to) (NP (DT the) (JJ same) (NN oxygen) (NN atom))))))))) (. .)))