( ( For example ) ( , ( ( ( the ( Earth 's ) ) crust ) ( ( ( ( has ( ( a ( maximum thickness ) ) ( of ( ( roughly 100 ) kilometers ) ) ) ) , ) ( whereas ( ( ( ( its mantle ) ( is ( ( 2,800 kilometers ) thick ) ) ) and ) ( ( its core ) ( is ( ( ( about 3,500 ) kilometers ) ( in radius ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN For) (NP (NN example))) (, ,) (NP (NP (DT the) (NN Earth) (POS 's)) (NN crust)) (VP (VBZ has) (NP (NP (DT a) (JJ maximum) (NN thickness)) (PP (IN of) (NP (QP (RB roughly) (CD 100)) (NNS kilometers)))) (, ,) (SBAR (IN whereas) (S (S (NP (PRP$ its) (NN mantle)) (VP (VBZ is) (ADJP (NP (CD 2,800) (NNS kilometers)) (JJ thick)))) (CC and) (S (NP (PRP$ its) (NN core)) (VP (VBZ is) (NP (NP (QP (RB about) (CD 3,500)) (NNS kilometers)) (PP (IN in) (NP (NNS radius))))))))) (. .)))
For example, the Earth's crust has a maximum thickness of roughly 100 kilometers, whereas its mantle is 2,800 kilometers thick and its core is about 3,500 kilometers in radius.
(ROOT (S (NP (NP (NP (DT The) (NN earth) (POS 's)) (JJ continental) (NN crust)) (, ,) (PP (IN on) (NP (NN average))) (, ,)) (VP (VBZ is) (ADJP (NP (CD 35) (NNS kilometers)) (JJ thick))) (. .)))