( ( Understand ( ( the concepts ) ( of ( phyletic ( gradualism ( and ( punctuated equilibrium ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Understand) (NP (NP (DT the) (NNS concepts)) (PP (IN of) (NP (JJ phyletic) (NN gradualism) (CC and) (NN punctuated) (NN equilibrium))))) (. .)))
Understand the concepts of phyletic gradualism and punctuated equilibrium.
(ROOT (S (NP (NNP Darwin)) (VP (VBD believed) (PP (IN in) (NP (NN gradualism)))) (. .)))