( ( ( ( ( ( Compounds ( which ( ( contain ( a ( phosphorus atom ) ) ) ( with ( two chalcogens ) ) ) ) ) -LRB- ) ( i.e. ( , ( oxygen ( , ( sulfur ( , ( selenium ( , ( or tellurium ) ) ) ) ) ) ) ) ) ) -RRB- ) ( ( bonded ( directly thereto ) ) ( in ( the ( same ring ) ) ) ) ) . )
(ROOT (NP (NP (NP (NP (NNS Compounds)) (SBAR (WHNP (WDT which)) (S (VP (VBP contain) (NP (DT a) (NN phosphorus) (NN atom)) (PP (IN with) (NP (CD two) (NNS chalcogens))))))) (-LRB- -LRB-) (NP (CD i.e.) (, ,) (NN oxygen) (, ,) (NN sulfur) (, ,) (NN selenium) (, ,) (CC or) (NN tellurium)) (-RRB- -RRB-)) (NP (NP (VBN bonded) (JJ directly) (NN thereto)) (PP (IN in) (NP (DT the) (JJ same) (NN ring)))) (. .)))
Compounds which contain a phosphorus atom with two chalcogens (i.e., oxygen, sulfur, selenium, or tellurium) bonded directly thereto in the same ring.
(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))))))))) (. .)))