Historians have often discussed the  three estates  of the Western world'nobility, church, and commons.
( Historians ( ( ( have often ) ( discussed ( ( the ( three estates ) ) ( of ( ( ( the ( Western ( world ( ` ( nobility ( , ( church , ) ) ) ) ) ) ) and ) commons ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Historians)) (VP (VBP have) (ADVP (RB often)) (VP (VBN discussed) (NP (NP (DT the) (CD three) (NNS estates)) (PP (IN of) (NP (NP (DT the) (JJ Western) (NN world) (`` `) (NN nobility) (, ,) (NN church) (, ,)) (CC and) (NP (NNS commons))))))) (. .)))
The nobility of the Western world often have inherited wealth.
( ( ( The nobility ) ( of ( the ( Western world ) ) ) ) ( often ( ( have ( inherited wealth ) ) . ) ) )
(ROOT (S (NP (NP (DT The) (NN nobility)) (PP (IN of) (NP (DT the) (JJ Western) (NN world)))) (ADVP (RB often)) (VP (VBP have) (VP (VBN inherited) (NP (NN wealth)))) (. .)))