( Aromatic ( ( -LRB- ( arene -RRB- ) ) ( ( ( A ( major group ) ) ( of ( ( unsaturated ( cyclic hydrocarbons ) ) ( containing ( ( ( ( ( one or ) more ) rings ) ( -LRB- ( ( ( e.g. , ) benzene ) -RRB- ) ) ) ( -LRB- ( ( ( These highly ) reactive ) ( and ( chemically ( versatile compounds ) ) ) ) ) ) ) ) ) ) ( ( have ( a ( ( ( ( ( strong , ) but ) ( not unpleasant ) ) , ) odor ) ) ) ; ) ) ) )
(ROOT (S (ADVP (RB Aromatic)) (PRN (-LRB- -LRB-) (VP (VB arene)) (-RRB- -RRB-)) (NP (NP (DT A) (JJ major) (NN group)) (PP (IN of) (NP (NP (JJ unsaturated) (JJ cyclic) (NNS hydrocarbons)) (VP (VBG containing) (NP (NP (NP (QP (CD one) (CC or) (JJR more)) (NNS rings)) (PRN (-LRB- -LRB-) (NP (NNP e.g.)) (, ,) (NP (NN benzene)) (-RRB- -RRB-))) (PRN (-LRB- -LRB-) (UCP (ADJP (NP (DT These) (RB highly)) (JJ reactive)) (CC and) (ADVP (RB chemically)) (ADJP (JJ versatile) (JJ compounds))))))))) (VP (VBP have) (NP (DT a) (ADJP (ADJP (JJ strong)) (, ,) (CC but) (ADJP (RB not) (JJ unpleasant)) (, ,)) (NN odor))) (: ;)))
Aromatic (arene) A major group of unsaturated cyclic hydrocarbons containing one or more rings (e.g., benzene) (These highly reactive and chemically versatile compounds have a strong, but not unpleasant, odor;
(ROOT (S (NP (DT A) (NN lipid)) (VP (VBZ is) (NP (NP (CD one)) (PP (IN of) (NP (NP (DT a) (ADJP (RB highly) (JJ diverse)) (NN group)) (PP (IN of) (NP (NP (NNS compounds)) (VP (VBN made) (PRT (RP up)) (ADVP (RB mostly))))) (PP (IN of) (NP (NNS hydrocarbons))))))) (. .)))