( ( ( ( ( Compounds ( wherein ( ( ( a X ) - ) ( ( group , ) ( ( in which ) ( ( the ( X 's ) ) ( are ( ( the ( ( ( same or ) diverse ) chalcogens ) ) ( -LRB- ( ( ( i.e. , ) ( oxygen ( , ( sulfur ( , ( selenium ( , ( or tellurium ) ) ) ) ) ) ) ) -RRB- ) ) ) ) ) ) ) ) ) ) , ) and ) ( ( the nitrogen ) ( are ( ( bonded directly ) ( to ( the ( same ( acyclic ( carbon atom ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Compounds)) (VP (VBZ wherein) (NP (NP (DT a) (NNP X)) (: -) (NP (NP (NN group)) (, ,) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (DT the) (NNP X) (POS 's)) (VP (VBP are) (NP (NP (DT the) (ADJP (JJ same) (CC or) (JJ diverse)) (NNS chalcogens)) (PRN (-LRB- -LRB-) (NP (NP (NNP i.e.)) (, ,) (NP (NN oxygen) (, ,) (NN sulfur) (, ,) (NN selenium) (, ,) (CC or) (NN tellurium))) (-RRB- -RRB-)))))))))) (, ,) (CC and) (S (NP (DT the) (NN nitrogen)) (VP (VBP are) (VP (VBG bonded) (ADVP (RB directly)) (PP (TO to) (NP (DT the) (JJ same) (JJ acyclic) (NN carbon) (NN atom)))))) (. .)))
Compounds wherein a X- group, in which the X's are the same or diverse chalcogens (i.e., oxygen, sulfur, selenium, or tellurium), and the nitrogen are bonded directly to the same acyclic carbon atom.
(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))))))))) (. .)))