( Subject ( ( matter ( wherein ( ( ( the ( organic compound ) ) ( which ( is ( devoid ( of sulfur ) ) ) ) ) ( ( contains ( a ( nitrogen atom ) ) ) ( as ( ( a ( ring member ) ) ( of ( a ( heterocyclic ( ring compound ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Subject)) (VP (NN matter) (SBAR (WHADVP (WRB wherein)) (S (NP (NP (DT the) (JJ organic) (NN compound)) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (ADJP (JJ devoid) (PP (IN of) (NP (NN sulfur)))))))) (VP (VBZ contains) (NP (DT a) (NN nitrogen) (NN atom)) (PP (IN as) (NP (NP (DT a) (NN ring) (NN member)) (PP (IN of) (NP (DT a) (JJ heterocyclic) (NN ring) (NN compound))))))))) (. .)))
Subject matter wherein the organic compound which is devoid of sulfur contains a nitrogen atom as a ring member of a heterocyclic ring compound.
(ROOT (S (NP (DT A) (JJ heterocyclic) (NN compound)) (VP (VBZ contains) (NP (NP (NNS atoms)) (PP (IN of) (NP (NP (QP (CD two) (CC or) (JJR more)) (JJ different) (NNS elements)) (PP (IN in) (NP (PRP$ its) (NN ring) (NN structure))))))) (. .)))