( ( Know ( ( the differences ) ( between ( gradualism ( and ( punctuated equilibrium ) ) ) ) ) ) . )
(ROOT (NP (NP (NNP Know)) (NP (NP (DT the) (NNS differences)) (PP (IN between) (NP (NN gradualism) (CC and) (NN punctuated) (NN equilibrium)))) (. .)))
Know the differences between gradualism and punctuated equilibrium.
(ROOT (S (NP (NNP Darwin)) (VP (VBD believed) (PP (IN in) (NP (NN gradualism)))) (. .)))