( Subject ( ( matter ( ( the ( heterocyclic ( ring compound ) ) ) ( contains ( ( ( at least ) one ) ( halogen atom ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Subject)) (VP (VBP matter) (SBAR (S (NP (DT the) (JJ heterocyclic) (NN ring) (NN compound)) (VP (VBZ contains) (NP (QP (IN at) (JJS least) (CD one)) (NN halogen) (NN atom)))))) (. .)))
Subject matter the heterocyclic ring compound contains at least one halogen atom.
(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))))))) (. .)))