( ( Consider ( ( three ( undeformed ( horizontal beds ) ) ) ( of ( sedimentary rock ) ) ) ) . )
(ROOT (S (VP (VB Consider) (NP (NP (CD three) (JJ undeformed) (JJ horizontal) (NNS beds)) (PP (IN of) (NP (JJ sedimentary) (NN rock))))) (. .)))
Consider three undeformed horizontal beds of sedimentary rock.
(ROOT (S (NP (NP (DT A) (VBG defining) (NN feature)) (PP (IN of) (NP (JJ deformed) (NN sedimentary) (NNS rocks)))) (VP (VBZ is) (SBAR (IN that) (S (NP (PRP they)) (VP (VBP are) (RB not) (ADJP (JJ horizontal)))))) (. .)))